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FIND3 is a minimal Android app for using with FIND3. This app will allow you to use your phone to perform constant scans of Bluetooth and WiFi signals and levels that can be associated with certain locations in your home to allow internal positioning. To receive the data, the FIND3 public server can be used or a personal server can be deployed. The Framework for Internal Navigation and Discovery (FIND) is like GPS, but for your every room in your house/business, with using only a simple smartphone or laptop. Your device (laptop or a smartphone) tracks itself by actively scanning for nearby Bluetooth/WiFi devices and records their signal strengths and classifying them based on known signal strengths for a given location. This repository is a complete re-write of the [github.com/schollz/find previous version of FIND]. The API for sending fingerprints (/track and /learn) is backward compatible. There are several notable improvements on the previous version: * Support for any data source, Bluetooth / WiFi / magnetic fields / etc. (previously just WiFi) * Passive scanning built-in (previously required a separate server) * Support for Bluetooth scanning in scanning utility (previously just WiFi) * Meta-learning with 10 different machine learning classifiers (previously just three) * Client uses Websockets+React which reduces bandwidth (and coding complexity) * Rolling compression of mac addresses for much smaller on-disk databases (see mapslimmer) * Data storage in SQLITE-database (previously it was BoltDB)

Flare (Free Libre Action Roleplaying Engine) is a simple game engine built to handle a very specific kind of game: single-player 2D action RPGs. Flare is not a reimplementation of an existing game or engine. It is a tribute to and exploration of the action RPG genre. Android version of Flare requires manual installation of engine data files. Instructions on how to install default game called 'The Empyrean Campaign' can be found here: https://github.com/flareteam/flare-engine/wiki/Android-Port

Shows a floating lock screen button. Software lockscreen button can help you get rid of worrying about your physical button's life. Floating button can keep you in your working app and don't need to go back to home screen in order to lock your screen. Long-clicking would send your custom Broadcast/Intent.

I lost my new phone. And because I don't use Google Services I couldn't locate it and my phone was gone for good. In the hope that this doesn't happen again, I developed this application, so that I can locate the phone via SMS. Features: - Locate the device (using GPS or cellular location) - Lock the device - Let the device ring - Take pictures with the device's camera to see its surroundings - Factory-reset the device Usage: You can control FMD (and thus your phone) either via SMS or via FMD Server. You send a command to the phone (e.g. "fmd ring") and the phone executes it. For SMS you can either define a list of trusted contacts (phone numbers) that are allowed to send commands. Or you can set a PIN to allow anonymous usage. Then non-trusted phone numbers can also send commands by including the PIN in the message. This is useful because now if you lose your phone, you can ask a random person for help to wipe your phone remotely. If you simply text "fmd" to your phone FMD will reply with a text listing the available commands. With FMD Server you get a web interface to send commands, to view the location of your device on a map, and to view pictures taken by the device. You can self-host FMD Server. For more details, see: https://gitlab.com/fmd-foss/fmd-server Disclaimer: This app is provided on a best effort basis. We hope it is useful, we use it ourselves, but this is a hobby project and we can't guarantee that it will work when you need it the most.

FMD edge is the "cutting edge" version of FMD. FMD edge receives updates faster, more often, and slightly earlier than FMD. FMD edge releases are generally stable and ready for day-to-day use. FMD allows you to locate and remotely control your Android device. This is useful if you have lost or misplaced it. FMD is decentralised, and users remain in full control of their data. For more details about FMD, see the project website (https://fmd-foss.org/docs/overview) or the F-Droid listing for the main FMD app (https://f-droid.org/packages/de.nulide.findmydevice/).

Conference program app for the FOSDEM conference https://fosdem.org About FOSDEM FOSDEM is a free event that offers open source communities a place to meet, share ideas and collaborate. Every year, thousands of developers of free and open source software from all over the world gather at the event. Features * View program by day and rooms (side by side) * Custom grid layout for smartphones (try landscape mode 🙃) and tablets * Read detailed descriptions (speaker names, start time, room name, links, ...) of events * Search and filter through all sessions * Add events to favorites list * Export favorites list * Setup alarms for individual events * Add events to your personal calendar * Share a website link to an event with others * Keep track of program changes * Automatic program updates (configurable in settings) * Vote and leave comments on FOSDEM talks and workshops * Integration with the c3nav indoor navigation project https://nav.fosdem.org * Integration with the FOSDEM room status API https://api.fosdem.org 🔤 Supported languages (Event descriptions excluded) * Danish * Dutch * English * Finnish * French * German * German (Austria) * Italian * Japanese * Lithuanian * Polish * Portuguese (Brazil) * Portuguese (Portugal) * Russian * Spanish * Swedish * Turkish 💡 Questions regarding the content can only be answered by the FOSDEM content team. This app simply offers a way to consume and personalize the conference schedule. 💣 Bug reports are very welcome. It would be awesome if you can describe how to reproduce the particular error in the issue tracker at: https://github.com/EventFahrplan/EventFahrplan/issues 🏆 The app is based on the EventFahrplan app https://f-droid.org/packages/info.metadude.android.congress.schedule which was initially built for the camp and annual congress of the Chaos Computer Club. The source code of the app is publicly available on GitHub at: https://github.com/johnjohndoe/CampFahrplan/tree/fosdem-2026. 🎨 The name FOSDEM and the gear logo are registered trademarks of FOSDEM VZW. Used with permission.

Advanced schedule browser for the FOSDEM conference in Brussels, Belgium. Download the most recent schedule and browse it offline. Features: * Browse sessions by day and by track * Instant search * Track schedule view optimized for phones and tablets * Full sessions details with related links, speakers info and room maps * Add sessions directly to your calendar * Share sessions with a link to their page on the FOSDEM website * Manage bookmarks and get notified when a bookmarked session is about to start * “Live” view: during FOSDEM, watch the realtime updated list of currently running and upcoming sessions * Includes a simple map of the site. Note: this app properly handles timezone changes and device reboots for notifications; you can download the schedule and add bookmarks on any timezone and you will get notified at the right time when the events start in Belgium. The name FOSDEM and the gear logo are registered trademarks of FOSDEM VZW. Used with permission.

"FOSS Browser" is a fully free (as in freedom) open source Android browser: privacy-friendly with a modern user interface. - Your privacy - your data. Project Homepage with further info: https://codeberg.org/Gaukler_Faun/FOSS_Browser ------------------------------------------------- UI/Handling ------------------------------------------------- FOSS Browser uses the latest Material You design libraries. Following system day/night mode and a wallpaper based theme are just two features of this new library. The UI is optimized for one-hand-use. All UI-elements are at the bottom of the screen. More features: • Keep screen on. • Open links in background. • Restore tabs on restart. ------------------------------------------------- Privacy ------------------------------------------------- FOSS Browser uses profiles to protect your privacy. For each profile you can enable or disable: AdBlock, JavaScript, cookies, fingerprint protection and much more. Profiles can also be saved for domains ("github.com" ⇒ Trusted website). This saved domains always overwrite the current profile. So, for example, "github.com" will always open with the trusted profile, even if you are browsing in the protected mode. More privacy features: • Build in AdBlock, which updates automatically. You can decide which content to block. AdBlock hosts are taken from Steven Black - AbBlock hosts: https://github.com/StevenBlack/hosts. • Third-part-cookies can not be disabled. • Enable or disable Android-autofill. • Delete browser data (on app exit). • Choose between different search engines (or set a custom one). • FOSS Browser itself doesn't collect any data ------------------------------------------------- Bookmarks filter ------------------------------------------------- Organize your bookmarks with filters. You can set custom names for each filter. Long press the bookmark icon in the toolbar to get fast access to your favorite bookmarks. ------------------------------------------------- Gestures ------------------------------------------------- You can assign nearly twenty different gestures to the toolbar and the toolbar buttons. Each in four directions. You can also trigger events by long pressing the toolbar buttons. So you have up to ten different gestures to control FOSS Browser. Supported is for example: load last website, switch tab, reload, open bookmarks, ... and many more. ------------------------------------------------- Backups ------------------------------------------------- Backup all your important data (bookmarks, history, trusted websites and so on) on your SD-card. You can also back up FOSS Browser settings. Backups can even be restored on a fresh install or an other device (if you copy the backup files to the new device).

FOSS Warn is an app for receiving global emergency alerts. Whether it's flooding, a tsunami, or bomb disposal, if there's an alert, you'll receive it. FOSS Warn uses the FOSS Public Alert Server to obtain alerts. This aggregates official feeds with alerts from over 100 countries worldwide. A list of supported countries can be found here: https://alerts.kde.org/sources/status Features: - Receive alerts in over 100 countries worldwide - Receive push notifications via UnifiedPush - Display alerts on a map - Material 3 FOSS Warn and the FOSS Public Alert Server are independent and in no way affiliated with any official authority.

https://2024.foss4g.org About FOSS4G FOSS4G is the acronym for Free and Open Source Software for Geospatial. It is the annual recurring global event hosted by OSGeo, the non-profit organization that supports and promotes the collaborative development of free and open source geographic technologies and open geospatial data. The conference covers all kinds of topics related to geospatial information and earth observation openness from Software development to Transition to FOSS4G, Use cases and applications, Education and research and Open data. This event is for all kinds of people interested in sharing experiences about maps, from developers who write code to users of geomatics software, people who make decisions, researchers, students and anyone who wants to learn, share and meet like GIS interested people. It attracts over 1,000 practitioners and advocates for free and open source software for geospatial and the tendency is to increase this number every year. It is the main meeting place and educational outreach opportunity for OSGeo members, supporters and newcomers - to share and learn from one another in presentations, hands-on workshops and a conference exhibition. For appreciating the quality and variety of the presentations, you can watch video recordings of past FOSS4G events on the FOSS4G YouTube channel (https://www.youtube.com/c/FOSS4G/) Features * View program by day and rooms (side by side) * Custom grid layout for smartphones (try landscape mode 🙃) and tablets * Read detailed descriptions (speaker names, start time, room name, links, ...) of events * Add events to favorites list * Export favorites list * Setup alarms for individual events * Add events to your personal calendar * Share a website link to an event with others * Keep track of program changes * Automatic program updates (configurable in settings) * Vote and leave comments on talks and workshops 🔤 Supported languages (Event descriptions excluded) * Danish * Dutch * English * Finnish * French * German * Italian * Japanese * Lithuanian * Polish * Portuguese (Brazil) * Portuguese (Portugal) * Russian * Spanish * Swedish * Turkish 💡 Questions regarding the content can only be answered by the FOSS4G content team. This app simply offers a way to consume and personalize the conference schedule. 💣 Bug reports are very welcome. It would be awesome if you can describe how to reproduce the particular error in the issue tracker at https://github.com/EventFahrplan/EventFahrplan/issues. 🏆 The app is based on the EventFahrplan app which was initially built for the camp and annual congress of the Chaos Computer Club. The source code of the app is publicly available on GitHub at: https://github.com/Smarzaro/Foss4g2024Schedule/tree/foss4g-belem-2024. 🎨 FOSS4G 2024 logo is CC-BY-ND 4.0.

Conference program app for the FOSS4G Europe 2025 conference in Mostar, Bosnia-Herzegovina https://2025.europe.foss4g.org About FOSS4G The Free and Open Source Software for Geospatial Europe (FOSS4GE) conference is the European branch event of the Open Source Geospatial Foundation (OSGeo) annual conference. OSGeo is the largest and most important international organization that unites the community of developers, users, and advocates of free and open source in geospatial. The main focus of the organization is fostering the development, maintenance, and use of free and open source software for geospatial, open standards, and open data. The democratizing nature of the field creates a basis for sharing geographic data, promotes cooperation between organizations and individuals, and enables the application of data in solving the most diverse everyday problems, being the basis for such fields as map applications, logistics, transport, infrastructure planning, organizing rescue work in disaster areas, etc. FOSS4G is a community event organized by volunteers, with a focus on building a diverse and sustainable open community, sharing our own experiences, and learning from others. Although it is software that brings us together, it’s the deep care for the society and the environment that surrounds us, helping solve the World’s problems one bit at a time, that connects us. Features * View program by day and rooms (side by side) * Custom grid layout for smartphones (try landscape mode 🙃) and tablets * Read detailed descriptions (speaker names, start time, room name, links, ...) of sessions * Search through all sessions * Add sessions to favorites list * Export favorites list * Setup alarms for individual sessions * Add sessions to your personal calendar * Share a website link to an session with others * Keep track of program changes * Automatic program updates (configurable in settings) * Vote and leave comments on talks and workshops 🔤 Supported languages (Session descriptions excluded) * Danish * Dutch * English * Finnish * French * German * Italian * Japanese * Lithuanian * Polish * Portuguese (Brazil) * Portuguese (Portugal) * Russian * Spanish * Swedish * Turkish 💡 Questions regarding the content can only be answered by the FOSS4G content team. This app simply offers a way to consume and personalize the conference schedule. 💣 Bug reports are very welcome. It would be awesome if you can describe how to reproduce the particular error in the issue tracker at https://github.com/EventFahrplan/EventFahrplan/issues. 🏆 The app is based on the EventFahrplan app which was initially built for the camp and annual congress of the Chaos Computer Club. The source code of the app is publicly available on GitHub at: https://github.com/johnjohndoe/CampFahrplan/tree/foss4g-2025. 🎨 FOSS4G Europe Mostar 2025 logo: Creative Commons, CC-0.

Programm zur FOSSGIS-Konferenz am 25. - 28. März 2026 in Göttingen https://www.fossgis-konferenz.de Die FOSSGIS-Konferenz ist im D-A-CH-Raum die führende Konferenz für Freie und Open Source Software für Geoinformationssysteme sowie für die Themen Open Data und OpenStreetMap. Funktionen * Tagesüberblick über alle Programmpunkte * Beschreibung von Veranstaltungen lesen * Veranstaltungen in persönlicher Favoritenliste verwalten * Alle Veranstaltungen durchsuchen und filtern * Favoritenliste exportieren * Alarm für Veranstaltungen setzen * Veranstaltungen in Kalender eintragen * Link zu Veranstaltungen mit anderen teilen * Programmänderungen einsehen * Veranstaltungen bewerten * Integration mit dem Helfersystem, https://helfen.fossgis.de (siehe Einstellungen in der App) * Integration mit Chaosflix https://github.com/NiciDieNase/chaosflix - Android App für https://media.ccc.de, teile Fahrplan-Favoriten mit Chaosflix und importiere sie als Bookmarks 🔤 Unterstützte Sprachen (Programmtexte ausgenommen) * Dänisch * Deutsch * Deutsch, Österreich * Englisch * Finnisch * Französisch * Italienisch * Japanisch * Litauisch * Niederländisch * Polnisch * Portugiesisch, Brasilien * Portugiesisch, Portugal * Russisch * Spanisch * Schwedisch * Türkisch 💡 Inhaltliche Fragen zum Programm kann nur das FOSSGIS-Team beantworten. Diese App stellt lediglich die Programmpunkte zur Verfügung. 💣 Fehlerberichte sind herzlich willkommen, aber achte darauf, dass du erklärst, wie man den Fehler reproduzieren kann. Der Issue-Tracker findet sich hier: https://github.com/EventFahrplan/EventFahrplan/issues 🏆 Die App basiert auf der EventFahrplan-App https://f-droid.org/packages/info.metadude.android.congress.schedule/ für den Kongress des Chaos Computer Clubs. Der Quellcode der Anwendung ist auf GitHub https://github.com/johnjohndoe/CampFahrplan/tree/fossgis-2026 zu finden. 🎨 FOSSGIS-Logo-Design: Jane Eder

"FREE Browser" is a web browser for optimal privacy • fully open source • no ads, no trackers • no unnecessary permissions This app depends on the built-in Android WebView. Make sure to keep it up to date. ------------------------------------------------- FEATURES ------------------------------------------------- • AdBlocker using StevenBlack host list • Measures against browser fingerprinting • Cookie Banner Blocker: Auto "Deny", based on Cookie Banner Rules from Firefox • Advanced settings for javascript, cookies and DOM-storage (domain/bookmark based) • Third party cookies are not supported in general. • Support for Greasemonkey style scripts (supported: @match, @name, @run-at) • Optimized for one hand handling (toolbar at bottom) • TAB control (switch, open, close, unlimited tabs) • Fast toggle for most important settings • Zoom in/out • Search current website • Web search (from marked text via context menu) • Save as PDF • Open links in other apps (for example YouTube) • Backup • etc

This application lets you to view your club's players list easily and compare them by any attribute. '''How to use?''' Download .xls file from your players page, then launch the application and load the file. After that you'll see the players list. To see more information about the player tap on his name. '''What is GK(45.6) thing?''' It is a position rate which is calculated based on skill importance table provided by FootballStrategy.org developers. The maximum value is 100. I would recommend to choose player position from the best five. '''What does LR in position name mean?''' It is short for left/right wing. WBLR means both WBL and WBR positions and so on.

This app can serve files over the internet but the most likely usage is to access files from another computer without needing a cable. The name Demo in the launcher just means that it corresponds to the free version on Google. The app is fully featured so instead of buying the "Full" version as a way of contributing you can donate via the Paypal link.

FTP Share is a file sharing application based on the Apache FTP server component.Features:You can use anonymous mode to log in, specify the shared main path and set the write permission;Several users can be set, and the shared main path and write permission can be specified separately;You can set the main path to external storage (due to different Android versions and device models, the actual use may be different);You can choose to disconnect FTP service automatically in some cases, such as when WiFi connection is disconnected, when hotspot is disconnected, after a specified time;Dark mode, Chinese and English support.About external calls to the FTP service:The FTP service of this application is exposed to outside. If you want to start the FTP service of this application through other applications or automation applications such as Tasker, you can do so by calling an intent (see project page for details).

FTPClient is a very simple FTP, FTPS and SFTP client for Android 5.0+, using Apache Commons Net (https://commons.apache.org/proper/commons-net) and SSHJ (https://github.com/hierynomus/sshj/). Features - view directory content - upload files to servers - create directories - download files - view file and directory properties - rename files and directories - view text and image files - edit text files

Step into the enchanting world of FaFa Runner: Dawn Legends, where an epic adventure awaits! Developed using Flutter and the Flame engine, this RPG delivers a seamless gaming experience with stunning visual effects. Embark on your journey as a brave adventurer, explore mysterious lands, uncover hidden secrets, and face endless challenges. With rich story-driven quests and diverse character progression systems, every battle offers a unique sense of achievement. Key Features: 1. Dynamic Combat System: Enjoy intuitive controls and fluid action as you take on powerful enemies and formidable bosses. 2. Gorgeous Visuals: Experience vivid graphics and captivating animations, thanks to the powerful Flutter and Flame engine. 3. Rich Quest System: Engage in main quests and side stories, with each adventure offering surprises and challenges. 4. Customizable Character Growth: Tailor your hero with various skills and equipment to build the ultimate warrior. 5. Interactive World Exploration: Discover hidden treasures and secret locations across a fantastical map. Join FaFa Runner: Dawn Legends and create your own legendary tale in this magical world. Download now and begin your epic adventure! Supported languages： 1. English 2. Simplified Chinese

Create and play interactive fiction on your Android phone or tablet. Also known as text adventures, interactive books, playable novels, z-machine, glulx, tads, terps. Fun for adults and also a great way to encourage children to read and develop their imaginations. Fabularium can play all of the major formats: Adrift (including version 5), AdvSys, the Adventure Game Toolkit (AGT), Alan (2 and 3), Glulx, Hugo, Level 9, Magnetic Scrolls, Scott Adams Adventures (Scottfree), Tads (2 and 3) and Zcode (Infocom). It also includes a simple integrated development environment (IDE) for creating your own Glulx, Tads 3 and Zcode games. Fabularium supports Unicode games, so if you would prefer to play in a language other than English, no problems! Either define your own keyboard via the keyboards.ini file (see examples in that file) or disable the built-in keyboard via the settings, to use your system keyboard. Keyboards defined via keyboards.ini can have multiple layouts and each key can be programmed to generate one Unicode character, a complete command, or even multiple commands, that are fed to the interpreter one by one. As with anything else in fab.ini, you can set the different keyboards you've defined in keyboards.ini to automatically load with different game and terp combinations. Fabularium takes accessibility seriously. Much of the app is now TalkBack enabled and the built-in keyboard supports "explore by touch" and "lift to type" technology. Accessibility features will continue to improve over the coming releases. If you are blind or vision-impaired and would like to help me with this (e.g. testing and feature suggestions), let me know. We care about typography! While the default settings should work for most games, Fabularium is also highly customisable. Make the margins as narrow or as wide as you want. Don't like the default fonts and colours? Change them. Adjust line spacing. Fiddle with other typographical features. Optimise that game for your device's screen. For maximum screen space, try using a hardware keyboard. Fabularium is and always will be completely free, with no ads, and open source. It does not come bundled with any games; you will need to obtain these separately. There are many games freely available at www.ifdb.tads.org and www.ifarchive.org. You can download these games anywhere to your internal storage/SD card and then add them to your library from within the app. The app is also able to extract files from ZIP archives. Inspired by the great Gargoyle interpreter by Tor Andersson, Fabularium implements Andrew Plotkin's Glk 0.7.5 spec in Android and can therefore support any glk-enabled interpreter. More interpreters may be added in the future. For further information see the in-app help.

FadCam is a privacy-focused, open-source multimedia recorder designed for continuous and crash-safe reliable recording use cases.Key Features: Background video recording with screen off • Dashcam-style recording for driving/riding • Android screen recording with annotation tools • Live streaming over local network • Remote camera control through web UI • Fragmented MP4 format (zero corruption risk) • Custom watermark text overlaysPerfect for: CCTV camera at home - monitor and control via FadCam Remote web UI • Dashcam while driving or riding • Feature-rich screen recorder for Android (no watermarks) • Security monitoring and content creationAll features work without ads or trackers.FadCam Pro is also available for lifetime access purchase - check my Patreon link inside the app for details.

Berlin-bike-theft-warning is a simple application which informs the user about the number of stolen bicycles and bikeaccidents either by location or by tapping. The data is provided by Polizei Berlin and distributed by ODIS

FairEmail is easy to set up and works with virtually all email providers, including Gmail, Outlook and Yahoo! Note that OAuth was not approved by Google, etc for the F-Droid build. For this you'll need to use the Play store version or the GitHub release. FairEmail might be for you if you value your privacy. FairEmail is an email client only, so you need to bring your own email address. FairEmail does not support non-standard protocols, like Microsoft Exchange Web Services and Microsoft ActiveSync. Main features * Fully featured * 100 % open source * Privacy oriented * Unlimited accounts * Unlimited email addresses * Unified inbox (optionally accounts or folders) * Conversation threading * Two way synchronization * Push notifications * Offline storage and operations * Common text style options (size, color, lists, etc) * Battery friendly * Low data usage * Small (~30 MB) * Material design (including dark/black theme) * Maintained and supported This app is deliberately minimalistic by design, so you can concentrate on reading and writing messages. This app starts a foreground service with a low priority status bar notification to make sure you'll never miss new emails. Privacy features * Encryption/decryption supported (OpenPGP, S/MIME) * Reformat messages to prevent phishing * Confirm showing images to prevent tracking * Confirm opening links to prevent tracking and phishing * Attempt to recognize and disable tracking images * Warning if messages could not be authenticated Simple * Quick setup * Easy navigation * No bells and whistles * No distracting "eye candy" Secure * No data storage on third party servers * Using open standards (IMAP, POP3, SMTP, OpenPGP, S/MIME, etc) * Safe message view (styling, scripting and unsafe HTML removed) * Confirm opening links, images and attachments * No special permissions required * No advertisements * No analytics and no tracking (error reporting via Bugsnag is opt-in) * No Google backup * No Firebase Cloud Messaging * FairEmail is an original work, not a fork or a clone Efficient * Fast and lightweight * IMAP IDLE (push messages) supported * Built with latest development tools and libraries Pro features All pro features are convenience or advanced features. * Account/identity/folder colors * Colored stars * Notification settings (sounds) per account/folder/sender (requires Android 8 Oreo) * Configurable notification actions * Snooze messages * Send messages after selected time * Synchronization scheduling * Reply templates * Accept/decline calendar invitations * Add message to calendar * Filter rules * Automatic message classification * Search indexing * S/MIME sign/encrypt * Biometric/PIN authentication * Message list widget * Export settings For more information, please see here: https://github.com/M66B/FairEmail/blob/master/README.md

FairScan is a document scanner designed to be truly simple and respectful. With FairScan, it takes only a few seconds to get a clean PDF you can share or save. • Fast capture, optional review, instant export • Clear, distraction-free interface • Live automatic document detection • Automatic crop, perspective correction, and enhancement • Export to shareable PDFs FairScan works entirely offline. Minimal permissions required: • Camera • On Android 9 and below: storage (to save PDFs to Downloads)

This is a fork of the Fairphone 2 checkup app that has been modified in order to work on other devices as well. It allows you to test various components of your phone: * Screen * Speakers * Microphones * Mobile connectivity * Wi-Fi * Vibration It can be useful when you need to diagnose an issue with your device.