# E11 Apps

> E11 Apps is a small Android app studio. Its apps do their work on the phone, need no account, and are free on Google Play (with ads). Contact: e11toolapps@gmail.com.

## Apps

- [PDF Burrow](https://e11apps.com/pdf-burrow/): Scan, merge, compress, convert, sign, edit and protect PDFs — 49 tools that run on your phone. Your files are never uploaded. Google Play: https://play.google.com/store/apps/details?id=com.pdfden.app
- [Screenshot Brain](https://e11apps.com/screenshot-brain/): Search text in your screenshots, sort receipts and bookings, get reminded before return windows close, and clean up duplicates — with text recognition running on your phone. Google Play: https://play.google.com/store/apps/details?id=ai.screenshotbrain.app
- [CyberBoost](https://e11apps.com/cyberboost/): A live HUD with real ping, battery temperature and refresh rate, one-tap game modes that silence interruptions, instant replay and a Wi‑Fi vs mobile-data ping test. No regular Android app can raise a game’s FPS, lower your ping by itself or change another game’s graphics — CyberBoost doesn’t pretend to. It measures, silences and links you to the settings that matter. Google Play: https://play.google.com/store/apps/details?id=com.cyberboost.gamebooster
- [CellRadar](https://e11apps.com/cellradar/): Live 4G/5G and Wi-Fi signal in plain words, a speed test, a Wi-Fi analyzer, the devices on your network and a step-by-step Network Doctor that explains why the internet feels slow. No app can boost your signal or speed up your network. CellRadar measures what your phone receives, explains it and points you to the fix — a better channel, a better spot, or a call to your provider. Google Play: https://play.google.com/store/apps/details?id=com.cellradar.app

## PDF Burrow guides

- [What to look for in an all-in-one PDF app for Android](https://e11apps.com/blog/best-pdf-app-for-android/): The best PDF app for Android keeps your files on the phone, covers the tasks you do weekly, and saves clean files. Here is a checklist to judge any app.
- [How to edit a PDF on Android](https://e11apps.com/blog/edit-pdf-on-android/): To edit a PDF on Android, use an app that lets you tap text to change it, add text or images and fix pages. Here is what each kind of edit needs.
- [How to merge PDF files on your phone](https://e11apps.com/blog/merge-pdf-on-phone/): To merge PDF files on your phone, pick them in a merge tool, drag them into order and save one new PDF. Steps, plus fixes for file size and page order.
- [How to compress a PDF without losing quality](https://e11apps.com/blog/compress-pdf-without-losing-quality/): To compress a PDF without losing visible quality, shrink the images inside it, not the text. Learn what makes PDFs large and which settings keep pages sharp.
- [How to get a PDF under 1 MB, 500 KB or 200 KB](https://e11apps.com/blog/compress-pdf-under-1mb/): To compress a PDF to 1 MB or less, shrink its images, drop pages you do not need and rescan heavy pages. A step-by-step plan for 1 MB, 500 KB and 200 KB.
- [How to compress a photo to 100 KB for an online form](https://e11apps.com/blog/compress-image-to-100kb/): To compress an image to 100 KB, resize it to the dimensions the form asks for, save it as JPG and lower the quality until it fits. Steps for any form.
- [How to scan documents to PDF with your phone](https://e11apps.com/blog/scan-documents-with-your-phone/): To scan to PDF with your phone, use a scanner mode that finds the page edges, flattens and cleans each page, then saves all the pages as a single PDF file.
- [Phone scanning tips for clean, readable PDFs](https://e11apps.com/blog/scan-better-tips/): These document scanner tips cover light, angle, background, focus and filters, so your phone scans come out flat, sharp and easy to read every time.
- [How to make a scanned PDF searchable with OCR](https://e11apps.com/blog/make-scanned-pdf-searchable/): OCR makes a scanned PDF searchable by reading the words in each page image and adding a hidden text layer. Here is how to OCR a PDF and check it.
- [How to convert PDF to Word on Android](https://e11apps.com/blog/pdf-to-word-on-android/): To convert PDF to Word on Android, open the file in a converter, save it as .docx and check the layout. What converts well, what does not, and fixes.
- [How to turn PDF pages into JPG images](https://e11apps.com/blog/pdf-to-jpg/): To convert PDF to JPG, open the file in a converter, choose the pages and save each one as an image. Which resolution to pick, and when PNG is better.
- [How to combine photos into one PDF](https://e11apps.com/blog/images-to-pdf/): To convert an image to PDF, pick your photos in order, choose page size, orientation and margins, and save. One tidy PDF beats a pile of loose photos.
- [How to put both sides of an ID card on one PDF page](https://e11apps.com/blog/id-card-to-pdf/): To turn an ID card to PDF, scan the front and back and place both on one page at real card size. It prints like a photocopy and most offices accept it.
- [How to extract all the text from a PDF](https://e11apps.com/blog/pdf-to-text/): To convert PDF to text, use a tool that pulls every word out and saves it as a .txt file or copies it. Scanned PDFs need OCR first. Here is how to do both.
- [How to turn a PDF into PowerPoint slides](https://e11apps.com/blog/pdf-to-powerpoint/): To convert PDF to PPT, turn each page into a slide and save a .pptx you can present. What to expect from the result and how to make slides easy to edit.
- [How to make a PDF from plain text on your phone](https://e11apps.com/blog/text-to-pdf/): To convert text to PDF on your phone, type or paste it, or load a .txt file, and save. A clean PDF looks the same on every device you send it to.
- [How to sign a PDF on your phone](https://e11apps.com/blog/sign-pdf-on-phone/): To sign a PDF on your phone, draw your signature with your finger, place it on the line, resize it and save. Most forms need no printing or scanning.
- [How to fill PDF forms on Android](https://e11apps.com/blog/fill-pdf-forms-on-android/): To fill a PDF form on Android, tap each field, type or tick your answers and save. Flat forms without fields need text placed on top instead.
- [Filling a form by voice: an easier way for long forms](https://e11apps.com/blog/fill-a-form-by-voice/): To fill a form by voice, let your phone read each question aloud, speak your answer and check it lands in the right box. Ideal for long forms.
- [How to password protect a PDF](https://e11apps.com/blog/password-protect-pdf/): To password protect a PDF, set a strong password in a protect tool and save an encrypted copy. Then share the password separately from the file.
- [How to remove a password from a PDF you own](https://e11apps.com/blog/unlock-pdf/): To unlock a PDF you own, open it with the password and save a copy without protection. How it works, what restrictions are, and when to keep the lock.
- [How to redact a PDF properly (and why black boxes are not enough)](https://e11apps.com/blog/redact-pdf-properly/): To redact a PDF properly, use a tool that deletes the text under each black box, then test by searching and copying. Drawn boxes alone leak data.
- [What does flattening a PDF mean, and when should you do it?](https://e11apps.com/blog/flatten-pdf/): To flatten a PDF is to merge form fields, signatures, notes and stamps into the page so they cannot be moved or edited. When to flatten, and when not.
- [How to add a watermark to a PDF](https://e11apps.com/blog/add-watermark-to-pdf/): To watermark a PDF, choose your text, set its size and transparency, and stamp it across every page. How to make one that is visible yet readable.
- [How to add page numbers to a PDF](https://e11apps.com/blog/add-page-numbers-to-pdf/): To add page numbers to a PDF, pick a position and style in a page-number tool and apply it to every page. How to number merged files and reports.
- [How to add headers and footers to a PDF](https://e11apps.com/blog/headers-and-footers-in-pdf/): Add a PDF header or footer by choosing the text, the corner and extras like page numbers or the date, then checking it does not cover your content.
- [How to reorder, rotate or delete PDF pages](https://e11apps.com/blog/reorder-rotate-delete-pdf-pages/): To rearrange PDF pages, open a page organizer, drag the thumbnails into order, rotate or delete pages as needed and save the result as a new file.
- [How to crop PDF pages and trim margins](https://e11apps.com/blog/crop-pdf-margins/): To crop a PDF, drag a frame over the part of the page you want to keep and save. Cropping hides the edges but usually leaves them inside the file.
- [How to resize PDF pages to A4 or Letter](https://e11apps.com/blog/resize-pdf-to-a4/): To resize a PDF to A4 or Letter, use a page resize tool to fit every page to the new size, then check margins and text before you print or upload it.
- [How to add bookmarks and a table of contents to a PDF](https://e11apps.com/blog/pdf-bookmarks-table-of-contents/): PDF bookmarks are clickable chapter links shown in the sidebar of a PDF reader. Add one per section, name it clearly and point it at its first page.
- [How to search for a word inside a PDF](https://e11apps.com/blog/search-inside-a-pdf/): To search a PDF, open its find or search option, type the word and jump between matches. If nothing is found, the PDF is probably a scan without text.
- [Reading PDFs on a small phone screen without zooming](https://e11apps.com/blog/read-pdf-on-small-screen/): A PDF reader mode reflows the text to fit your phone screen, like an ebook, so you can read without pinching, zooming and scrolling sideways on every line.
- [How to highlight and annotate a PDF on Android](https://e11apps.com/blog/highlight-and-annotate-pdf/): To annotate a PDF on Android, open it in an editor with markup tools, select text to highlight or underline, add notes or drawings and save a copy.
- [How to add clickable links to a PDF](https://e11apps.com/blog/add-hyperlinks-to-pdf/): To add a link to a PDF, select the text or image, choose a web address or email as the target, save, then tap the link in another reader to test it.
- [How to change a PDF's title and author](https://e11apps.com/blog/edit-pdf-metadata/): PDF metadata is hidden information such as the title, author and subject. Change it in a metadata editor, save a copy and check it in the file properties.
- [How to summarize a PDF and ask it questions](https://e11apps.com/blog/ask-ai-about-a-pdf/): To summarize a PDF with AI, give an assistant the document, ask for a short summary, then ask specific questions and check each answer against the page.
- [Hide your personal details before sending a PDF to ChatGPT](https://e11apps.com/blog/hide-personal-data-before-chatgpt/): Before you upload a PDF to an AI chatbot, swap your name, ID, phone and account numbers for placeholders, then restore the real details in the answer.
- [How to spot signs a salary slip or bank statement was edited](https://e11apps.com/blog/check-if-a-document-was-edited/): To detect an edited PDF, check its metadata, look for mixed fonts and misaligned text, and re-add the totals. These are clues, so confirm with the issuer.
- [How to translate a PDF on your phone](https://e11apps.com/blog/translate-a-pdf/): To translate a PDF on a phone, open it in a translation tool, pick the language and save the translated copy. Scans need OCR first so there is text to read.
- [How to make a professional invoice PDF on your phone](https://e11apps.com/blog/create-an-invoice-on-your-phone/): An invoice maker on your phone lets you fill in your details, items, tax and logo, then export a tidy PDF to send. Here is what to include and how to do it.
- [Scan bills and receipts and get reminded before they are due](https://e11apps.com/blog/scan-bills-and-receipts/): Scan a bill to pick out its due date and amount, then set a bill reminder or calendar entry. Receipts can go into an expense log for tracking spending.
- [How to open Word, Excel and CSV files on Android](https://e11apps.com/blog/open-word-and-excel-files-on-android/): To open a DOCX on Android, tap the file and pick an app that reads Office files. Excel and CSV work the same way, and you can save a PDF copy to share.
- [How to edit an Excel spreadsheet on your phone](https://e11apps.com/blog/edit-excel-on-android/): To edit Excel on Android, open the XLSX in a spreadsheet editor, tap a cell to change it, add or delete rows, then save it as XLSX. Simple edits work well.
- [Make a résumé PDF on your phone from a template](https://e11apps.com/blog/resume-template-on-phone/): A resume template PDF gives you a ready layout to fill in on your phone. Add your details, keep it to one or two pages and export it as a PDF to apply.
- [How to send several PDFs as one ZIP file](https://e11apps.com/blog/zip-several-pdfs/): To turn PDF to ZIP, select the files, bundle them into one .zip archive and send that single file. ZIP keeps files together but rarely shrinks PDFs much.
- [How to print a PDF from your Android phone](https://e11apps.com/blog/print-a-pdf-from-android/): To print a PDF on Android, open it, tap Print, choose a printer on the same Wi-Fi and check the settings. You need a print service for your printer.
- [Edit PDFs with your voice: "delete page 3 and compress it"](https://e11apps.com/blog/voice-commands-for-pdf/): A voice PDF editor turns a spoken request such as delete page 3 and compress it into steps, shows the plan, then runs it. Here is how to phrase commands.
- [Are online PDF tools safe for private documents?](https://e11apps.com/blog/are-online-pdf-tools-safe/): Online PDF tools upload your file to a server. They can be safe for public files, but for IDs, payslips and contracts, check the policy or work on your phone.
- [Why an offline PDF editor is better for private files](https://e11apps.com/blog/offline-pdf-editor/): An offline PDF editor works on your phone, so private files are never uploaded. It is also faster on slow data and keeps working with no signal at all.
- [PDF Burrow guide: the tools most people need first](https://e11apps.com/blog/pdf-burrow-getting-started/): New to the PDF Burrow app? Start with scanning, compressing, merging, signing and photos to PDF, then explore the privacy, office and AI tools as needed.

## Screenshot Brain guides

- [How to search the text inside your screenshots on Android](https://e11apps.com/blog/search-text-in-screenshots-android/): To search text in screenshots on Android, each image must be read with OCR first. Learn how it works, which tools can do it and how to get better results.
- [How to find an old screenshot fast](https://e11apps.com/blog/find-an-old-screenshot-fast/): To find an old screenshot fast, search for one word that was in it, then narrow by date or category. It works even when you barely remember it.
- [How to organize screenshots on Android](https://e11apps.com/blog/organize-screenshots-on-android/): The simplest way to organize screenshots on Android is to sort new ones as they arrive, group keepers by purpose and delete the rest. A system that lasts.
- [How to find and delete duplicate screenshots](https://e11apps.com/blog/delete-duplicate-screenshots/): To delete duplicate screenshots safely, find exact copies first, keep the original, then remove the extras. Why copies appear and what to do about it.
- [Free up phone storage by cleaning your screenshots](https://e11apps.com/blog/free-up-storage-screenshots/): A screenshot cleaner frees up phone storage by finding duplicates, similar shots, old clutter and large files. What to delete first, and how to do it safely.
- [What makes a good screenshot manager app for Android](https://e11apps.com/blog/best-screenshot-manager-app/): A good screenshot manager app searches the text in screenshots, sorts them, cleans clutter safely and respects privacy. A checklist to judge any app.
- [What is OCR? How your phone reads text in pictures](https://e11apps.com/blog/what-is-ocr/): OCR, or optical character recognition, turns a picture of words into real text. How your phone does it, why it gets letters wrong and where it helps.
- [On-device OCR vs cloud OCR: which is more private?](https://e11apps.com/blog/on-device-ocr-vs-cloud-ocr/): On-device OCR is more private because images never leave the phone, while cloud OCR sends them to a server. How they compare on privacy, speed and accuracy.
- [How to copy text from a screenshot on Android](https://e11apps.com/blog/copy-text-from-a-screenshot/): To copy text from an image on Android, open it with a text-recognition tool such as Google Lens, select the words and tap Copy. Four ways to do it, plus tips.
- [How to take a screenshot on any Android phone](https://e11apps.com/blog/how-to-take-a-screenshot-on-android/): To take a screenshot on Android, press the Power and Volume Down buttons together. Other ways too, from gestures to voice, for when the buttons fail.
- [How to take a scrolling screenshot on Android](https://e11apps.com/blog/scrolling-screenshot-android/): To take a scrolling screenshot on Android, take a normal screenshot, then tap Capture more or Scroll in the preview. How it works and what to try if it fails.
- [Screenshot not working on Android? Common causes and fixes](https://e11apps.com/blog/screenshot-not-working-android/): Screenshot not working on Android? The app may block it, the button timing may be off or storage may be full. The common causes and how to fix each one.
- [Where are screenshots saved on Android?](https://e11apps.com/blog/where-are-screenshots-saved-android/): On most Android phones, screenshots are saved in a Screenshots folder inside Pictures or DCIM. How to find them in your gallery and in your files app.
- [Why your screenshots get lost in the photo gallery](https://e11apps.com/blog/why-screenshots-get-lost-in-gallery/): Screenshots get lost in the gallery because it sorts by date, mixes them with photos and cannot read their words. Why it happens and how to fix it.
- [How much storage do your screenshots really use?](https://e11apps.com/blog/how-much-storage-screenshots-use/): One screenshot is small, but thousands of them, plus copies and backups, can add up to gigabytes. How to check your screenshots storage and cut it.
- [Screenshot inbox zero: a 5-minute weekly habit](https://e11apps.com/blog/screenshot-inbox-zero/): Screenshot inbox zero means sorting every new screenshot once a week: keep, act on or delete. A 5-minute screenshot habit that stops the pile growing.
- [Similar screenshots: how to keep the best and delete the rest](https://e11apps.com/blog/find-similar-screenshots/): A similar photos cleaner groups screenshots that look nearly the same so you can keep the best one. How to choose the keeper and avoid deleting a key detail.
- [Deleted a screenshot by mistake? How a recycle bin helps](https://e11apps.com/blog/recover-deleted-screenshots/): To recover a deleted screenshot, check the recycle bin in your gallery or screenshot app first, then your backups and chats. Where to look, step by step.
- [Using screenshots to keep track of online receipts](https://e11apps.com/blog/keep-receipts-with-screenshots/): Receipt screenshots are a quick way to keep proof of online orders. What to capture, how to name and group them, and how to find one when you need a refund.
- [Never miss a return window again](https://e11apps.com/blog/never-miss-a-return-window/): To never miss a return window, note the deadline when you buy, check when the clock starts and set a return window reminder a few days before it ends.
- [How to track warranty dates on your phone](https://e11apps.com/blog/track-warranty-dates-on-your-phone/): To track warranty dates on your phone, save the receipt, note the model and serial number, and set a reminder before cover ends. A simple routine.
- [Track paper receipts with a quick photo](https://e11apps.com/blog/snap-paper-receipts/): Paper receipts fade and get lost, so a quick photo keeps the details safe. How to photograph one so it stays readable, and how a paper receipt app helps.
- [How to find an order number you screenshotted weeks ago](https://e11apps.com/blog/find-order-numbers-in-screenshots/): To find an order number in an old screenshot, search for the shop name or part of the number, then narrow by date. What to try when search misses it.
- [Stop losing coupon codes you screenshotted](https://e11apps.com/blog/find-coupon-codes-in-screenshots/): A coupon code screenshot only helps if you can find it before it expires. How to capture the terms, keep codes in one place and search them at checkout.
- [Keep travel bookings and tickets organized with screenshots](https://e11apps.com/blog/organize-travel-bookings/): Travel booking screenshots keep references, times and addresses on your phone even without signal. What to capture, how to group a trip and what to clear.
- [Boarding pass screenshots: tips so you are never stuck at the gate](https://e11apps.com/blog/boarding-pass-screenshot-tips/): A boarding pass screenshot usually works if the barcode is sharp and current. Here is how to take one that scans, stays findable and keeps your booking safe.
- [Keeping payment confirmation screenshots you can actually find](https://e11apps.com/blog/payment-proof-screenshots/): A good payment screenshot shows the amount, date, reference and status. Learn what to capture, how to name it and how long to keep proof of each payment.
- [12 screenshot collections worth making](https://e11apps.com/blog/screenshot-collections-ideas/): Twelve screenshot collections that keep useful images findable, from receipts and travel to recipes, study notes and gift ideas, plus tips to keep them tidy.
- [Tagging and renaming screenshots so search works better](https://e11apps.com/blog/tag-and-rename-screenshots/): Tag screenshots with short, consistent words and rename the ones that matter. Here is when tags help search, which tags to use and mistakes to avoid.
- [How automatic screenshot categories work](https://e11apps.com/blog/smart-categories-explained/): Apps auto categorize screenshots by reading the text, then spotting clues like totals, flight codes or promo codes. Here is how it works and where it slips.
- [Search tips: how to find a screenshot when you only remember one word](https://e11apps.com/blog/screenshot-search-tips/): Screenshot search tips for when you remember just one word: pick rare terms, search what was on screen, try number fragments and narrow by date or category.
- [How to find a screenshot by date](https://e11apps.com/blog/find-screenshot-by-date/): To find a screenshot by date, sort your Screenshots folder by date, read the date in the file name or use a date filter. Here is why dates sometimes go wrong.
- [How to hide card numbers before sharing a screenshot](https://e11apps.com/blog/hide-card-numbers-before-sharing/): To hide a card number in a screenshot, crop it out or cover it with a solid box, not a blur. Here is what to hide, the safest methods and common mistakes.
- [What to check before you share a screenshot](https://e11apps.com/blog/check-before-sharing-a-screenshot/): To share a screenshot safely, check the notifications, names, numbers, codes, links and addresses in it, and crop out what the other person does not need.
- [The hidden privacy risks in your screenshots](https://e11apps.com/blog/screenshot-privacy-risks/): Your screenshots can hold sign-in codes, bank details, IDs and private chats. Learn the main screenshot privacy risks and how to keep your gallery safer.
- [How to hide private screenshots on Android](https://e11apps.com/blog/hide-private-screenshots-android/): To hide screenshots on Android, move them into a locked folder protected by a PIN or fingerprint. Here are the options, how they differ and what to watch for.
- [Bank details in screenshots: how to keep them safe](https://e11apps.com/blog/bank-details-in-screenshots/): A bank details screenshot is handy for payments but risky if it shows too much. Learn what is safe to share, what to hide and where to keep these images.
- [How to back up screenshots with encryption](https://e11apps.com/blog/encrypted-screenshot-backup/): An encrypted backup on Android locks your screenshots with a passphrase only you know. Here is how it works, how to make one and how to keep the key safe.
- [What permissions a screenshot app needs, and why](https://e11apps.com/blog/screenshot-app-permissions/): A screenshot app permission list should be short: access to your images or the photo picker, and notifications for reminders. Here is what each one is for.
- [How students can use screenshots as study notes](https://e11apps.com/blog/screenshots-for-students/): Screenshots make good study notes when you capture with purpose, label by module and rewrite them in your own words. A simple weekly workflow for students.
- [Screenshots at work: keeping meeting details and codes findable](https://e11apps.com/blog/screenshots-at-work/): Screenshots for work are useful for meeting IDs, error messages and expenses. Here is how to capture them well, find them fast and stay within company rules.
- [Turning recipe screenshots into a cookbook you can search](https://e11apps.com/blog/save-recipes-from-screenshots/): Recipe screenshots become a searchable cookbook when you capture the full recipe, keep the source, tag by meal or ingredient and prune what you never cook.
- [Build a shopping wishlist from screenshots](https://e11apps.com/blog/shopping-wishlist-screenshots/): Shopping screenshots make a handy wishlist if you capture the price, store and model, wait before you buy and keep the receipt afterwards. A simple system.
- [Using screenshots as reminders without losing them](https://e11apps.com/blog/screenshots-as-reminders/): A screenshot reminder only works if it leads to action. Pair each screenshot with a date, a calendar entry or an inbox you review, then delete it when done.
- [Track medicine expiry dates with a photo of the box](https://e11apps.com/blog/medicine-box-photo-tracking/): A photo of the box makes a simple medicine expiry tracker. Learn where expiry dates are printed, what to photograph and how to get reminded before they lapse.
- [Cleaning up the screenshots and images WhatsApp leaves behind](https://e11apps.com/blog/whatsapp-images-cleanup/): A WhatsApp images cleanup starts in the app storage tool, then stops new clutter with media settings and clears duplicates and screenshots from your gallery.
- [A monthly digital declutter for your phone](https://e11apps.com/blog/digital-declutter-your-phone/): A monthly digital declutter for your phone takes under an hour: apps, notifications, home screen, screenshots, downloads, chats, storage and backups.
- [Screenshot hoarding: why we save so many and how to cope](https://e11apps.com/blog/screenshot-hoarding/): Too many screenshots? It happens because saving is effortless and deleting feels risky. Here is why screenshots pile up and gentle ways to keep them in check.
- [Can you search screenshots without the internet?](https://e11apps.com/blog/offline-screenshot-search/): Offline screenshot search works when text is read and indexed on the phone. Here is how it works, what can need a connection first and how to test any app.
- [Screenshot Brain guide: your first 10 minutes](https://e11apps.com/blog/screenshot-brain-getting-started/): New to the Screenshot Brain app? This guide covers your first 10 minutes: language, first read, search, collections, Inbox, reminders, privacy and cleanup.

## CyberBoost guides

- [Do game booster apps really work? An honest answer](https://e11apps.com/blog/do-game-boosters-really-work/): Most game booster apps cannot raise FPS or lower ping. Here is what they really do, what helps a game run well, and how to spot empty promises.
- [What to look for in the best game booster for Android](https://e11apps.com/blog/best-game-booster-for-android/): The best game booster for Android is honest about its limits. Look for real measurements, useful game modes, sensible permissions and no fake FPS claims.
- [How to play games smoothly on Android: what actually helps](https://e11apps.com/blog/how-to-play-games-smoothly-on-android/): Smooth Android gaming comes from heat control, the right power and display settings, sensible graphics choices and a stable network. Here is what to change.
- [Why games lag on your Android phone, and which causes you can fix](https://e11apps.com/blog/why-games-lag-on-android/): Game lag on Android comes from heat, power limits, heavy graphics, a weak network or a full phone. Learn to tell them apart and which you can fix.
- [Game booster vs gaming mode: what is the difference?](https://e11apps.com/blog/game-booster-vs-gaming-mode/): A gaming mode is a set of real phone settings for play, while a game booster usually promises speed it cannot deliver. Here is how they differ.
- [Do RAM cleaners make games faster?](https://e11apps.com/blog/do-ram-cleaners-make-games-faster/): RAM cleaners rarely make Android games faster, because the system already frees memory when a game needs it. Here is how memory works and what helps.
- [Game booster for low-end phones: what helps on an older phone](https://e11apps.com/blog/game-booster-for-low-end-phones/): On an older or budget phone, a booster app cannot add power. Lower graphics, free storage, cooler play and the right power settings make games playable.
- [Red flags in game booster apps: fake FPS and "ping boost" claims](https://e11apps.com/blog/red-flags-in-game-booster-apps/): Fake FPS counters, ping boost promises and CPU cooler animations are signs a gaming app is not honest. Learn the red flags and what an honest app looks like.
- [Are game booster apps safe? Permissions to watch for](https://e11apps.com/blog/are-game-booster-apps-safe/): Most game booster apps are safe enough, but some ask for far more access than they need. Learn which permissions make sense and which should worry you.
- [How to get a lower, steadier ping in mobile games](https://e11apps.com/blog/how-to-get-lower-ping-in-mobile-games/): A lower ping in mobile games comes from a quieter connection: the right network, a nearby router, fewer downloads and the closest server region.
- [Ping spikes and packet loss explained for mobile gamers](https://e11apps.com/blog/ping-spikes-and-packet-loss-explained/): Ping spikes are sudden jumps in delay and packet loss is data that never arrives. Learn how each feels in a game, what causes them and how to find the source.
- [How to test your ping on Android before a ranked match](https://e11apps.com/blog/how-to-test-ping-on-android/): Test ping on Android with the in-game network display, a browser speed test or a ping app. Here is how to run a fair test and read the result before ranked.
- [Wi-Fi or mobile data for gaming: how to test which is faster](https://e11apps.com/blog/wifi-or-mobile-data-for-gaming/): Neither Wi-Fi nor mobile data always wins for gaming. Test both at the same moment where you play, compare ping and steadiness, and pick the steadier one.
- [2.4 GHz vs 5 GHz Wi-Fi for mobile gaming](https://e11apps.com/blog/24-vs-5-ghz-wifi-for-gaming/): Near the router, 5 GHz Wi-Fi is usually steadier and less crowded for mobile gaming, while 2.4 GHz reaches farther. Here is how to choose and switch bands.
- [Why your ping gets worse in the evening](https://e11apps.com/blog/why-ping-is-worse-in-the-evening/): Ping often rises in the evening because more people share your home network, your provider and game servers at once. Learn how to confirm it and what helps.
- [Phone overheating while gaming? Causes and fixes](https://e11apps.com/blog/phone-overheating-while-gaming/): A phone overheats while gaming because the chip, screen and battery work hard at once. Learn the causes, the quick fixes and when heat signals a fault.
- [What battery temperature is safe while gaming?](https://e11apps.com/blog/safe-battery-temperature-for-gaming/): A phone battery is usually fine below about 40°C, warm in the low 40s and too hot from the mid-40s. Here is how to read battery temperature while gaming.
- [Thermal throttling: why a game slows down after 15 minutes](https://e11apps.com/blog/thermal-throttling-explained/): Thermal throttling is when a hot phone lowers its chip speed to protect itself, so games slow down after a while. Learn how to spot it and how to delay it.
- [Is it bad to play games while your phone is charging?](https://e11apps.com/blog/is-gaming-while-charging-bad/): Gaming while charging is not dangerous with a good charger, but the extra heat can age the battery and slow the game. Here is how to do it more safely.
- [60 Hz, 90 Hz or 120 Hz: does refresh rate matter for mobile gaming?](https://e11apps.com/blog/refresh-rate-for-mobile-gaming/): A 90 Hz or 120 Hz screen only makes games smoother if the game runs above 60 fps and your phone holds it. Here is how refresh rate and frame rate interact.
- [How to check your phone's real refresh rate](https://e11apps.com/blog/check-your-phone-refresh-rate/): Your display setting shows the maximum, not what the screen is doing now. Here is how to check refresh rate on Android in settings and while you play.
- [How to stop calls and notifications interrupting your games](https://e11apps.com/blog/stop-notifications-while-gaming/): Do Not Disturb is the simplest way to block notifications while gaming. Here is how to set it up, allow key contacts and switch it on automatically.
- [How to set up an automatic game mode on Android](https://e11apps.com/blog/automatic-game-mode-on-android/): An automatic game mode on Android turns on Do Not Disturb and your play settings when a game opens, then restores them. Here are three ways to set one up.
- [Why you should turn off battery saver before gaming](https://e11apps.com/blog/battery-saver-and-gaming/): Battery saver often caps processor speed and screen refresh rate, which makes games stutter. Learn what it changes and what to do when battery is low.
- [Is Data Saver causing lag in your online games?](https://e11apps.com/blog/data-saver-causing-game-lag/): Data Saver mainly limits background data, but it can stall downloads, voice chat and game services. Here is how Data Saver lag happens and how to fix it.
- [Does full storage slow down games?](https://e11apps.com/blog/does-full-storage-slow-down-games/): Nearly full storage can cause slow loading, stutter and failed updates in mobile games. Learn why it happens, what it cannot cause and how much space to keep.
- [Should you close background apps before gaming?](https://e11apps.com/blog/close-background-apps-before-gaming/): Swiping away every app before gaming rarely helps on Android. Close only apps that are actively working, like downloads, video calls or navigation.
- [Why auto-brightness gets in the way when you game](https://e11apps.com/blog/auto-brightness-and-gaming/): Auto-brightness can dim your screen mid-match when your hand covers the light sensor. Here is why it happens and how to pick a fixed brightness for gaming.
- [Best in-game graphics settings for low-end Android phones](https://e11apps.com/blog/best-graphics-settings-for-low-end-phones/): On a low-end phone, a steady frame rate matters more than sharp graphics. Here is the order to change in-game settings and which effects to switch off first.
- [Game settings that work on 4 GB RAM phones](https://e11apps.com/blog/game-settings-for-4gb-ram-phones/): On a 4 GB RAM phone, memory runs out before raw power does. These game settings lower texture load, avoid reloads and keep matches stable to the end.
- [Are GFX tools safe? What they can and cannot change](https://e11apps.com/blog/are-gfx-tools-safe/): A GFX tool edits a game's settings files, at best. It cannot add power, and it may break game rules or ask for risky permissions. Here is how to judge one.
- [A two-minute pre-game checklist for ranked matches](https://e11apps.com/blog/pre-game-checklist/): A quick pre-game checklist for ranked mobile matches: battery saver, heat, storage, network, notifications and you. Run it in two minutes before you queue.
- [What a gaming HUD overlay shows and why it helps](https://e11apps.com/blog/gaming-hud-overlay-explained/): A gaming HUD on Android is a small overlay showing live ping, CPU clock, memory, temperature and refresh rate while you play, so you can see why a match lags.
- [How to record gameplay on Android with game sound](https://e11apps.com/blog/record-gameplay-on-android/): To record gameplay on Android with game sound, use a recorder that captures device audio, allow screen capture and silence notifications. Steps and tips.
- [Save your best gaming moments without recording the whole match](https://e11apps.com/blog/save-gaming-highlights-instant-replay/): Instant replay on Android keeps the last stretch of gameplay ready, so you tap save after a great play instead of recording and trimming an entire match.
- [Recording mobile gameplay at 60 fps: what you need](https://e11apps.com/blog/record-mobile-games-at-60fps/): To record mobile gameplay at 60 fps, the game must run at 60 fps or more, and you need a 60 fps screen recorder, enough storage and a phone that stays cool.
- [How to track how long you play games each week](https://e11apps.com/blog/track-your-playtime/): Track weekly gaming time with Android's screen time tools or a gaming time tracker, then read the trends: total hours, late sessions and the top games.
- [Gaming breaks: how often to take them and why](https://e11apps.com/blog/gaming-break-reminders/): A common guide is a short break between matches and a longer one about every hour. A gaming break reminder helps your eyes, hands, focus and a hot phone.
- [Free Fire lag on a low-end phone: fixes that actually help](https://e11apps.com/blog/free-fire-lag-fix/): A Free Fire lag fix starts with knowing your lag type. Lower graphics, keep the phone cool, turn off battery saver and choose the network with steadier ping.
- [PUBG Mobile and BGMI lag: a practical fix list](https://e11apps.com/blog/pubg-mobile-lag-fix/): A practical PUBG Mobile lag fix list for PUBG and BGMI: match graphics to frame rate, pick the nearest server, manage heat in long games and test your ping.
- [Call of Duty: Mobile lag and stutter: what to check](https://e11apps.com/blog/cod-mobile-lag-fix/): A COD Mobile lag fix depends on the symptom: stutter, rubber-banding or delayed sound. Check graphics per mode, resource downloads, heat, ping and headphones.
- [Keeping Genshin Impact smooth and cool on Android](https://e11apps.com/blog/genshin-impact-smooth-on-android/): Genshin Impact lag on Android is mostly heat and graphics load. Pick a frame rate your phone can hold, trim costly effects and keep the phone cool.
- [Mobile Legends lag and high ping: what to try](https://e11apps.com/blog/mobile-legends-lag-fix/): A Mobile Legends lag fix is mostly about steady ping: test Wi-Fi and data, use 5 GHz near the router, stop downloads and keep team fights light on graphics.
- [Developer options gamers ask about, and which to leave alone](https://e11apps.com/blog/developer-options-for-gamers/): Most developer options do not make games run better, and some make them worse. Here is what each gaming-related setting really does and which to leave off.
- [Bluetooth headphones and audio delay in mobile games](https://e11apps.com/blog/bluetooth-headphones-audio-lag-gaming/): Bluetooth latency in gaming happens because audio is compressed, sent and buffered. Wired headphones avoid it; low-latency modes and good codecs reduce it.
- [Touch response settings that make controls feel smoother](https://e11apps.com/blog/touch-response-settings-for-gaming/): Touch sensitivity in gaming covers in-game sensitivity, your phone's screen sensitivity and the screen itself. Tune each in order for smoother controls.
- [Do you need a gaming phone to play smoothly?](https://e11apps.com/blog/do-you-need-a-gaming-phone/): Gaming phone vs normal phone: you do not need a gaming phone to play smoothly. A strong chip that stays cool matters most; gaming phones add extra cooling.
- [Do game and Android updates improve performance?](https://e11apps.com/blog/do-updates-improve-game-performance/): An update can improve game performance with fixes and new device support, but it can also add heavier content. Here is what to expect and what to do next.
- [Why you should look at your ping history after a bad match](https://e11apps.com/blog/match-report-ping-history/): Ping history after a bad match shows whether the connection or your play was to blame. Learn to read spikes, steady high ping and disconnects, then act.
- [CyberBoost guide: modes, HUD and the ping test in 5 minutes](https://e11apps.com/blog/cyberboost-getting-started/): Set up the CyberBoost app in five minutes: run the pre-game checks, pick a game mode, turn on the live HUD and compare Wi-Fi and mobile data ping.

## CellRadar guides

- [How to check your real signal strength on Android](https://e11apps.com/blog/check-signal-strength-android/): To check signal strength on Android, find the dBm number in your SIM status screen or a signal app. Here is where to look and how to read it properly.
- [What does dBm mean? Signal strength numbers explained](https://e11apps.com/blog/what-does-dbm-mean/): dBm measures radio power against one milliwatt. Phone and Wi-Fi readings are negative, and every 3 dB step roughly doubles or halves the power you receive.
- [What is a good signal strength in dBm for 4G and 5G?](https://e11apps.com/blog/good-signal-strength-dbm/): A good signal strength in dBm for 4G or 5G is about −90 dBm or better. Below −100 dBm, data slows down, and below −110 dBm you may start to lose service.
- [Full bars but slow internet? Why bars lie](https://e11apps.com/blog/full-bars-but-slow-internet/): Full bars but slow internet usually means a busy cell, interference or a problem beyond the mast. Bars show signal strength, not speed. Here is how to check.
- [4G vs 5G: what you actually get on your phone](https://e11apps.com/blog/4g-vs-5g-what-you-get/): 4G vs 5G on a phone depends on which kind of 5G you get. Low-band 5G feels like good 4G, mid-band is faster, and high-band is very fast but short range.
- [Why your phone keeps dropping from 5G to 4G](https://e11apps.com/blog/why-5g-keeps-dropping-to-4g/): 5G dropping to 4G is usually caused by weak 5G coverage, power-saving settings or the network itself. Here is how to find the cause and what you can change.
- [How to get better mobile signal at home](https://e11apps.com/blog/improve-mobile-signal-at-home/): To improve signal at home, find the best spot, use Wi-Fi calling, try another network mode and only use a carrier-approved repeater. Apps cannot boost signal.
- [How to find the spot with the best signal in your house](https://e11apps.com/blog/find-best-signal-spot/): To find the best signal spot at home, take dBm readings in each room for 30 seconds, compare windows, floors and corners, and note the network type each time.
- [Make your own signal map of where coverage is weak](https://e11apps.com/blog/signal-map-of-your-area/): A personal signal map is a record of real readings you take on your own routes. It shows where coverage is weak, when it drops and which carrier works best.
- [LTE bands and cell IDs explained for normal people](https://e11apps.com/blog/band-and-cell-id-explained/): An LTE band is the frequency range your phone uses, and the cell ID names the mast and sector serving you. Together they explain your signal and speed.
- [Do signal booster apps work? The honest answer](https://e11apps.com/blog/signal-boosters-do-they-work/): No signal booster app can make your mobile signal stronger. Software cannot change the radio. Here is what these apps really do and what actually helps.
- [What a Wi-Fi analyzer shows and how to read it](https://e11apps.com/blog/wifi-analyzer-explained/): A Wi-Fi analyzer lists nearby networks with their signal, channel, band, width and security. Read the channel graph to see overlap and pick a clearer channel.
- [How to find the best Wi-Fi channel for your router](https://e11apps.com/blog/best-wifi-channel/): The best Wi-Fi channel is the one with the fewest strong neighbours. On 2.4 GHz pick 1, 6 or 11; on 5 GHz pick a quiet channel. Use a scan to choose.
- [How to change the Wi-Fi channel on your router](https://e11apps.com/blog/change-wifi-channel-on-router/): To change the Wi-Fi channel, open the router settings page or app, find the wireless settings for each band, pick a new channel and save. Here is how.
- [2.4 GHz vs 5 GHz vs 6 GHz Wi-Fi: which should you use?](https://e11apps.com/blog/24-vs-5-vs-6-ghz-wifi/): In 2.4 GHz vs 5 GHz Wi-Fi, 2.4 reaches further but is slower and busier, 5 GHz is faster nearby, and 6 GHz is fastest and quietest but has the shortest range.
- [Wi-Fi 6, 6E and 7 explained: do you need to upgrade?](https://e11apps.com/blog/wifi-6-6e-7-explained/): Wi-Fi 6 copes with busy homes, 6E adds the 6 GHz band and Wi-Fi 7 adds wider channels and multi-link. Upgrade only if your devices can use it.
- [How to find and fix Wi-Fi dead zones](https://e11apps.com/blog/wifi-dead-zones/): A Wi-Fi dead zone is a spot where your signal is too weak to use. Find it by walking with a signal meter, then fix it by moving the router, a channel or mesh.
- [Where to put your router for the best Wi-Fi](https://e11apps.com/blog/router-placement-tips/): Good router placement means central, high and in the open, away from metal, water and big appliances. Small moves can make a real difference to your Wi-Fi.
- [Mesh Wi-Fi vs a range extender: which fixes your problem?](https://e11apps.com/blog/mesh-wifi-vs-extender/): Mesh vs extender comes down to scale. An extender patches one weak room cheaply; mesh covers a whole home with one network and smooth handover.
- [How to measure Wi-Fi strength room by room](https://e11apps.com/blog/measure-wifi-strength-room-by-room/): Use a Wi-Fi strength meter on your phone, take a 30-second dBm reading in each room and add a speed test where it counts. A simple, repeatable method.
- [How to run an internet speed test that tells the truth](https://e11apps.com/blog/how-to-run-a-speed-test/): For an honest internet speed test, pause other traffic, test near the router or on a cable, run it three times at different hours and compare with your plan.
- [Download, upload, ping and jitter: what each number means](https://e11apps.com/blog/download-upload-ping-jitter/): Download and upload are speeds in Mbps. Ping is the round-trip delay in milliseconds, and jitter is how much that delay changes. Here is what good looks like.
- [Why is my internet so slow? A step-by-step check](https://e11apps.com/blog/why-internet-is-slow/): Why is my internet slow? Work out whether it is one device, your Wi-Fi, your router or your provider with this ordered check, from a restart to a line test.
- [Fast speed test but slow apps? Here is why](https://e11apps.com/blog/slow-wifi-but-fast-speed-test/): When a speed test is fast but apps feel slow, the cause is usually delay, slow DNS, a VPN or a busy app server, not bandwidth. Here is how to find it.
- [Is your connection good enough for video calls?](https://e11apps.com/blog/internet-for-video-calls/): The internet speed for video calls is modest, a few Mbps each way for HD, but upload, steady ping and low jitter matter most. Here is how to check yours.
- [What internet do you need for online gaming?](https://e11apps.com/blog/internet-for-gaming/): For online gaming, low and steady ping matters far more than raw speed. Here is what to check, what numbers to aim for, and how to fix lag at home.
- [What speed do you need to stream in 4K?](https://e11apps.com/blog/internet-for-4k-streaming/): Most services suggest roughly 15 to 25 Mbps for one 4K stream. Learn how to check your real speed at the TV and what to fix when 4K keeps dropping.
- [How to see who is connected to your Wi-Fi](https://e11apps.com/blog/who-is-on-my-wifi/): Check who is on your Wi-Fi through the device list in your router or a network scanner app, then match each device by its name, maker and MAC address.
- [Found an unknown device on your Wi-Fi? What to do](https://e11apps.com/blog/unknown-device-on-wifi/): An unknown device on your Wi-Fi is usually a forgotten gadget. Here is how to identify it calmly, and how to lock it out if it turns out to be a stranger.
- [Get an alert when a new device joins your Wi-Fi](https://e11apps.com/blog/get-alerted-when-device-joins/): A new device alert tells you the moment something joins your Wi-Fi. Learn your options through the router or a phone app, and how to avoid false alarms.
- [Checking a rental for hidden cameras on the Wi-Fi: what a scan can and cannot tell you](https://e11apps.com/blog/find-hidden-cameras-network/): A hidden camera Wi-Fi scan can show devices on the rental network, but it cannot find every camera. Here is what it reveals and what to check by eye.
- [10 steps to secure your home Wi-Fi](https://e11apps.com/blog/secure-your-home-wifi/): Ten clear steps to secure your home Wi-Fi, from a strong password and WPA3 to router updates, a guest network and checking which devices are connected.
- [How to share your Wi-Fi with a QR code](https://e11apps.com/blog/share-wifi-with-qr-code/): A Wi-Fi QR code lets guests join your network by pointing their camera at it, with no typing. Here is how to make one, share it safely and scan one.
- [Where to keep your Wi-Fi passwords safely](https://e11apps.com/blog/store-wifi-passwords-safely/): The safest place for Wi-Fi passwords is a Wi-Fi password manager or encrypted vault, not a screenshot or note. Here are good options and ones to avoid.
- [Ping and traceroute explained: find where the delay is](https://e11apps.com/blog/ping-and-traceroute-explained/): Ping measures the round trip to one server; traceroute shows each hop on the way. Learn how to read both and work out where your delay really starts.
- [What DNS is and how a slow DNS feels](https://e11apps.com/blog/dns-explained-and-slow-dns/): DNS turns website names into addresses. When DNS lookup is slow, pages pause before they start loading. Learn the signs, how to test it and what to try.
- [What is my IP address, and what can it reveal?](https://e11apps.com/blog/what-is-my-ip/): Your IP address is the number that identifies your connection online. Learn the public and private kinds, and what it reveals about you and what it does not.
- [What an open port is and how to check one](https://e11apps.com/blog/port-check-explained/): An open port means a device is listening for connections on that number. Learn how a port checker works, which ports are common, and when to close one.
- [How to wake a computer from your phone with Wake-on-LAN](https://e11apps.com/blog/wake-on-lan-from-phone/): Wake-on-LAN lets your Android phone switch on a sleeping computer with a magic packet. Here is how to set up the computer, the router and the phone.
- [Why GPS is weak indoors: satellites and open sky explained](https://e11apps.com/blog/gps-satellites-and-sky-view/): GPS signal is weak indoors because satellite signals are faint and blocked by roofs and walls. Learn how phone location works and how to get a faster fix.
- [What a network health score checks](https://e11apps.com/blog/network-health-score/): A network health check rolls speed, delay, Wi-Fi quality and security into one score. Learn what each part measures and which findings to fix first.
- [Why calls drop, and what you can do about it](https://e11apps.com/blog/call-drops-causes/): Call drops usually come from weak signal, a failed hand-over between masts or a busy cell. Learn how to find the cause and the fixes that actually help.
- [Why signal is weak inside buildings and basements](https://e11apps.com/blog/signal-in-basements-and-buildings/): Weak signal indoors comes from walls, metal, coated glass and soil between you and the mast. Learn which materials block most and what really helps.
- [Wi-Fi calling: when to turn it on](https://e11apps.com/blog/wifi-calling-explained/): Wi-Fi calling sends your normal phone calls over Wi-Fi when mobile signal is weak. Learn when to turn it on, when to leave it off, and how to set it up.
- [Does turning airplane mode on and off fix signal?](https://e11apps.com/blog/airplane-mode-trick/): Toggling airplane mode makes your phone reconnect and pick a cell again, which can fix a stuck connection. It cannot create signal. Here is when it helps.
- [How to compare carriers' coverage where you live](https://e11apps.com/blog/compare-carriers-coverage/): To compare carrier coverage, check official maps, then test each network yourself at home, work and on your commute. Here is how to run a fair test.
- [When to call your internet provider, and what to tell them](https://e11apps.com/blog/when-to-call-your-provider/): Call your internet provider once you have ruled out your own Wi-Fi and devices. Here is how to tell whose problem it is, and what details to give them.
- [Why keeping a signal history helps when you complain to your carrier](https://e11apps.com/blog/signal-history-and-reports/): A signal report with dates, places and dBm readings turns a vague complaint into evidence your carrier can act on. Here is what to log and how to share it.
- [Using hotel and café Wi-Fi safely](https://e11apps.com/blog/travel-wifi-safety/): Public Wi-Fi safety comes down to joining the right network, using encrypted sites and keeping sharing off. Clear steps for hotels, cafés and airports.
- [CellRadar guide: check your signal and Wi-Fi in 5 minutes](https://e11apps.com/blog/cellradar-getting-started/): A five-minute tour of the CellRadar app: read your live 4G or 5G signal, run a speed test, check your Wi-Fi channel and see which devices are on your network.

## Optional

- [Support](https://e11apps.com/support/)
- [PDF Burrow privacy policy](https://e11apps.com/pdf-burrow/privacy/)
- [Screenshot Brain privacy policy](https://e11apps.com/screenshot-brain/privacy/)
- [CyberBoost privacy policy](https://e11apps.com/cyberboost/privacy/)
- [CellRadar privacy policy](https://e11apps.com/cellradar/privacy/)