Productivity

1843 open source Productivity apps

Treasure Hunt
APK
This is an outdoor app that will let you or somebody you like experience a treasure hunt. Define waypoints in your area, then explore those waypoints and solve riddles, until you reach the final stage.
IzzyOnDroid
Treble Info
APK
This application allows you to check the Treble GSI requirements and determine the correct GSI type for your device. Key features: * Check Treble support status * Check Treble/VNDK version * Check system architecture * Check A-Only or A/B status * Check for binder64 * Check for System-as-Root * Does not require root access * Supports dark theme and uses Material Design 3 You can download GSIs from all over the internet. Check the XDA Forums (not affiliated) for some easy tutorials.
F-Droid
Tricky Tripper
APK
Especially for managing shared expenses. Tricky Tripper is an offline-compatible utility for managing travel expenses. It is especially intended for holidays with shared expenses, e.g. you go on a trip with your friends and from time to time one companion pays for all travelers. In such a situation Tricky Tripper splits the costs among the companions as you want it. The application calculates all debts among the travelers and offers means to get even, during or after the trip. Features: * Even or individual splitting of costs among travelers. * Debt protocol * Function to settle debts * It's offline-compatible. * Report export (Dropbox, Evernote, Mail, SDCard)
F-DroidGitHub
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TripleCamel
APK
Checks for product price history using the CamelCamelCamel website. You can also set a notification for when the price gets lower. You just have to share a product from the Amazon app, and choose Triple Camel as the sharing app from the list.
F-DroidGitHub
Trolly
APK
Trolly is a shopping list application with the aim of being a very simple app with no annoying or complicated features. It exposes intent filters to allow other apps to automatically add items to the shopping list.
F-Droid
Trudido
APK
Trudido is a privacy-friendly, open-source to-do list app built with Flutter. Organize your tasks, set reminders, and manage your daily life with a simple, intuitive interface. Trudido is designed for users who value transparency and control over their data—no ads, no tracking, and no unnecessary permissions. Features: - Add, edit, and delete tasks quickly - Organize tasks with categories and priorities - Set reminders to never miss important deadlines - Attach notes to tasks for extra details - Customizable themes including dark mode - Multilingual support for a global audience - Works offline—your data stays on your device Why Trudido? Trudido is lightweight, fast, and respects your privacy. All features are available without registration or cloud accounts. Perfect for students, professionals, and anyone who wants a reliable, distraction-free task manager. Trudido is free and open-source. Get organized and stay productive—your way!
F-DroidGitHub
TrustDevice Fingerprint
APK
TrustDevice is a lightweight library for determining device uniqueness and risk identification. It can create a device identifier based on basic device information. Tis will remain the same after uninstalling and reinstalling or clearing app data.This demo application shows you the details gathered and thus is useful for getting detailed device information. As a side effect it shows you what data an app can access without having any permissions – and could transfer it to „some servers“ if it had just the INTERNET permission.
GitHubIzzyOnDroid
Tryton
APK
Client for the Tryton ERP system. It lets you access and edit your enterprise information (accounting, invoice, production, stocks, and more) from your device. It is a generic client like the gtk client, and should be compatible with all Tryton modules. It also contains an SVG parser for Android. Use demo as user and password with the default configuration to connect to Tryton demo server.
F-Droid
TuCanMobile
APK
Das Studentenveraltungstool TUCaN Mobile der TU Darmstadt ist über das Smartphone bisher sehr schwer zu bedienen gewesen. Das ändert sich nun für alle Android-Benutzer. Diese App liest die Seite aus und stellt sie passend für kleine Bildschirme dar. Derzeit kann man sich leider nicht für Veranstaltungen anmelden und das Anmelden für Prüfungen ist nur experimentell, jedoch ist es sehr praktisch um schnell mal einige Infos oder Materialien von TUCaN herunterzuladen.
F-DroidGitHub
Tuner
APK
Accordion tuner with scope, spectrum and strobe or staff. Can show up to eight different notes or reeds concurrently. In portrait the app shows a scope with the input signal, a spectrum showing the processed signal, the main display with the note value, cents error, frequency error etc, a strobe or staff display and a meter display showing the cents error. In landscape the app shows just the main display or staff and the meter. There is a signal indicator in the action bar which is useful in landscape mode. * 32 temperaments including Equal, Just, Pythagorean, Meantone * Filter options, including low pass, fundamental, note and octave filter * Optional strobe or musical staff display * Custom temperaments option * Transposition option * Solfège (DoRéMi) option
F-DroidGitHub
Tux Math
APK
A bunch of asteroids are falling on the city and only you can stop them. Armed with a laser cannon, you will have to correctly perform the calculations indicated on the asteroids in order to be able to aim them correctly and destroy them. The game has many levels of difficulty, allowing you to train with additions, subtractions, multiplications, divisions and finally relative numbers. It will be perfect for schoolchildren who have to revise their tables, as well as adults who would like to challenge themselves with more difficult calculations. This game is a rewrite for android of the famous free software TuxMath, a very popular educational software for PC. Just like the original game, it's totally open source and free (AGPL v3 license), and without any advertising. This new version of TuxMath brings some new features: * The "auto level" option: when this option is activated, the game will automatically switch to another level if the player has too much ease or too much difficulty with the operations that he must solve. * Added levels with operations involving 3 numbers or more. * A penalty (igloo destroyed) in case of too many wrong answers (To discourage the strategy of trying all possible answers). * Possibility to play with 3 graphic themes: "Classic", "Original" and "Afrikalan".
F-Droid
Tux Paint
APK
Tux Paint is a free, award-winning drawing program for children ages 3 to 12 (for example, preschool and K-6). Tux Paint is used in schools around the world as a computer literacy drawing activity. It combines an easy-to-use interface, fun sound effects, and an encouraging cartoon mascot who guides children as they use the program.
F-DroidGitHub
Twili Recipes
APK
AI powered cooking assistant with Next Cloud integration. Easily add any recipe with the help of ChatGPT. Simply copy it from any page on the internet or type it manually. Recipes in all languages are supported. Recipes can be stored locally or in Next Cloud instance. Unique UI makes it easy to scale recipes and follow instructions. App is available for Android and Desktop. You can download version for other platforms from my website.
F-DroidGitHub
Twisted Home Manager
APK
Manage and switch between launchers, the apps that manage your homescreen. Available options include: * Switch between Home Apps (Launchers) * Clear Default Home app * Set Default Home app * Reference to 36 home apps on the market
F-DroidGitHub
Type and Speak
APK
Type and Speak makes your phone say out loud whatever you type! Save speech to use as ringtones and alarms. Can work via the share menu so you can have entire articles read out loud. Uses Android's multi-lingual text-to-speech engine which supports UK English, US English, French, Italian, German, and Spanish pronunciations.
F-Droid
UCLL Student
APK
Show relevant information for UCLL students, for example personal course calendar, portal announcements and bus departures.
F-Droid
UMS Interface
APK
UMS Interface allows you to chose a block device or disk image as a 'disk',and communicate with PC through usb mass storage (just as usb disk do).There are some special usages. For example, you can select the whole emmc /dev/block/mmcblk0 and mount it to pc linux, so that you can some tool like gparted to do something like partition. And you can also use it as boot disk. Note: This app is no longer maintained and thus will receive no more updates.
GitHubIzzyOnDroid
UP-Example
APK
This application is a generic application using UnifiedPush. It can be used to test your settings. You need to install an UnifiedPush distributor for this to work. More information at https://unifiedpush.org
F-DroidIzzyOnDroid
URLCheck
APK
This application acts as an intermediary when opening url links. When you do so, a window containing information about the url is displayed, allowing you to make changes to it as well. Specially useful when you need to open an external link either from an email, a social network app or others. URLCheck is developed by TrianguloY, originally for personal use. It is open source (under CC BY 4.0 license), free, without any ads or trackers, light sized and using as few permissions as necessary (only the internet permission, for module checks that will only be performed when the user request them). The source code is available on GitHub too, if you want to suggest changes, perform modifications or propose a new translation: https://github.com/TrianguloY/URLCheck The app is structured with a modular setup, you can enable/disable and reorder individual modules, which include: * Input text: Displays the current url which can be edited manually. Can't be disabled. * History: View and revert any change from other modules, including edits from the user (typical undo/redo feature) * Log: Keeps a log of all checked urls, which you can view, edit, copy, clear... * Status code: By pressing the button a network request will be made to retrieve that url, and the status code will be displayed (ok, server error, not found...). Additionally, if it corresponds to a redirection, press the message to check the new url. The url is fetched, but not evaluated, so redirection based on javascript won't be detected. * Url Scanner: Allows you to scan the url using VirusTotal, and check the report. A free personal VirusTotal API key is needed for it to work. VirusTotal™ is a trademark of Google, Inc. * Url Cleaner: Uses the ClearURLs catalog to remove referral and useless parameters from the url. It also allows for common offline url redirections. Built-in catalog from https://docs.clearurls.xyz/latest/specs/rules/ * Unshortener: Uses https://unshorten.me/ to unshorten urls remotely. * Queries remover: Displays the decoded individual url queries, which you can remove or check. * Pattern module: Checks the url with regex patterns that warns, suggests or applies replacements. You can modify or create your own patterns, or even use user-created ones. Built-in patterns include: - Warning when contains non-ascii characters like greek letters. This can be used for phishing: googĺe.com vs google.com - Suggest replacing 'http' with 'https' - Suggest replacing Youtube, Reddit or Twitter with privacy-friendly alternatives [disabled by default] * Hosts checker: This module labels hosts, configured either by specifying them manually or by using a remote hosts-like file. You can use it to warn about dangerous or special sites. The builtin configuration specifies StevenBlack's hosts (adware/malware, fakenews, gambling and adult content) from https://github.com/StevenBlack/hosts * Debug module: Displays the intent uri, and optionally info about the ctabs (custom tabs) service. This is intended for developers. * Open module: Contains the open and share buttons. If a link can be opened with multiple apps, an arrow will be shown to let you choose. Can't be disabled.
F-DroidGitHubIzzyOnDroid
US Travel Converter
APK
Converts useful imperial units to SI. Lots of tourists have problems with imperial units used in the USA, e.g. 6 foot 2 inch as body length. Its optimized for fast access to this units. Possible import tariffs can be calculated for EU import via mail or above the free of charge limit.
F-DroidGitHub
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USB Debugging
APK
Usb Debugging does automatically deny USB debugging on new computer without any dialog popup. You can configure it in its module properties once installed.
GitHubIzzyOnDroid
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USB Device Info
APK
Allows you to list all attached (host mode) USB devices. Information includes: * The Device class * The USB device path * The Vendor ID (VID) and the Product ID (PID) * A List of all interfaces and their endpoints If you download the accompanying databases, the application will also be able to provide you with additional info such as the Vendor of the device (which is not necessarily the brand!), the vendor's logo and the product name.
F-DroidGitHub
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USB Gadget Tool
APK
USB Gadget Tool allows you to create and activate USB device roles, like a mouse or a keyboard. Connected USB hosts (e.g. a normal computer) will then identify your Android device only under that role. It can also be used to deactivate the standard USB Gadget (including mtp, adb, etc.), e.g. for security reasons. Following USB gadgets are integrated: * Keyboard & Mouse (/dev/hidg0, /dev/hidg1) * FIDO CTAP (/dev/hidg0; for WebAuthn) * CCID (/dev/ccid_ctrl, /dev/ccid_bulk) * UVC camera (/dev/video?) USB Gadget Tool requires root permissions and a Kernel with ConfigFS support. Currently the app only enables the USB Gadget. For the usage of these device endpoints (e.g. /dev/hidg0) further apps are required.
F-DroidGitHub
USB HID Client
APK
This Android app allows you your phone to present itself to a connected device as a keyboard and mouse. Since this happens at a very low level, the connected device sees it exactly as a normal keyboard and mouse, meaning you don't need to install any software on the connected computer! For this reason, it will even work if the connected device is in its BIOS/UEFI. Even multimedia keys are supported, meaning you can send volume up/down keys to the connected computer to control media. I strongly recommend using Unexpected Keyboard to use special keys such as modifier and function keys, but most functionality will work with any standard Android keyboard.Bonus description for nerds: This app adds (and provides a simple UI for you to communicate with) two character devices (/dev/hidg0 and /dev/hidg1 respectively) by adding HID functions to the default Android USB gadget. If you wanted to, you could just use this app to create the character devices, then communicate solely through some C program, shell script, or whatever else you wanted as long as it had the right permissions to access the character devices and knew how to send proper reports to them. Beware of SELinux policies if you do that though. If anyone is actually doing that, let me know, I'd be glad to help if necessary.For more details on setup and usage, please consult the project's Readme.
GitHubIzzyOnDroid