Productivity

1843 open source Productivity apps

TransektCount
APK
TransectCount supports the species-specific counting of butterflies per transect section according to the European Butterfly Monitoring Scheme method. It is meant for transect counters to ease registering butterflies and day-flying moth during transect surveys. New in Version 5.1.3: - Exported results in xlsx spreadsheet improved - Exported results in csv spreadsheet improved - Code improvements - Text corrections - Docs updated - Bugfix Features: - Data collection is based on a transect inspection. - Databases refer to a transect and can be individually created and customised within the app with regard to metadata, transect sections and expected species. - The app contains an internal list with many European species and has a prepared database for a transect section with the most common species to be expected in Germany as a starting point for direct use. - Export of the current species list for later re-import by TransektCount or import by the complementary app TourCount. - Separate counters for internal/external counting areas and separately for ♂-♀-indeterminate, ♂, ♀, pupa, caterpillar or egg. - Results page with prepared presentation for transfer to the input mask of Butterfly Monitoring Germany (web.app.ufz.de/tagfalter-monitoring/). - The results can be exported in formatted XLSX or CSV format, as well as in an SQLite database file (e.g. to transfer them to a PC, for easier reading in a spreadsheet program, or for further processing). - The help contains detailed user instructions. - TransektCount supports counting in German, English, French, Italian and Spanish language and provides locale species names in these languages. Functions: - Duplicate and delete transect sections. - Editing the transect section lists (adding and deleting species and editing terms). - Editor for metadata in preparation for an inspection. - Counter page per section with scroll-down list for species selection. - Species editor for annotation and bulk counter entries. - Optionally, GPS support for an info to change the current section. - The results page shows metadata, notes, totals and counting results per species and transect section. Prerequisites: The app requires permits for - storage access for importing and exporting counting data, results, species lists or track data, - preventing the sleep mode und - (optionally) the GPS controlled signaling of the current transect section. The device screen should have a minimum resolution of 1024 x 1920 pixels. The app can be used with Android version 11 or newer. Documentation is provided under: https://github.com/wistein/TransektCount/tree/master/docs. TransektCount is one of two apps for monitoring European butterflies. The second app, TourCount, supports the species-specific and individually GPS-localised counting of butterflies on any walk in nature. Both apps use the coding scheme of Karsholt/Razowski for European butterflies and thus contain only European butterfly pictures.
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Translate You
APK
Translate You is a Translator App built with Material Design 3 (You). It supports multiple different translation engines such as LibreTranslate, Lingva, DeepL and more. In total, there are more than 200 supported languages across 6 different translation engines.
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Translation Cards
APK
Note: This app is no longer in active development and meanwhile seems abandoned, so there won't be any further updates. Please report should the app no longer work. Translation Cards allows you to create and use simple audio flashcards: tap a card and hear it spoken aloud in a different language. This app is for field workers, such as NGOs and volunteers, who need to communicate in foreign languages.Tap a card to hear a common phraseCreate your own cards in three stepsEasy to learn, easy to use in the fieldCurrently supports Farsi, Pashto, and Arabic
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Transparent Widget
APK
Allows you to create fully transparent widgets to make a blank screen on launchers like Google Launcher, Trebuchet etc. Optionally You can assign following actions on double tap * Lock Screen * Open Any app * Toggle Flash
F-Droid
Trayzero
APK
Trayzero brings David Allen's Getting Things Done (GTD) method to your phone. Free, open source, no ads, no account, no sign-up. Your data lives on your device. Always. THE FIVE GTD STEPS, BUILT IN Capture — one tap, anywhere. A floating Capture button on every screen. Share anything from any app straight into your inbox. Voice-to-text for hands-free thoughts. A home-screen widget for the fastest possible "add to inbox." Clarify — the killer flow. Process Inbox runs you through your captures one at a time, card-stack style. Each card walks the full GTD decision tree: actionable? Two-minute rule? Delegate? Single step or a project? When? Where? You hit inbox-zero faster than you thought possible. Organize — the canonical GTD lists. Inbox, Next Actions, Projects, Waiting For, Someday/Maybe, Calendar, Reference. Plus a real Project type with outcome, next-action warning, and Active / On Hold / Someday / Done / Dropped status. Seven default @-contexts you can extend (@phone, @computer, @errands, @home, @office, @anywhere, @waiting). Areas of Responsibility for the higher altitudes. Reflect — a Weekly Review wizard. A seven-step review walks you through the canonical GTD pass: clear inbox, review next actions, check waiting-for, scan calendar, review someday/maybe, look at projects, set next week's intentions. Daily review supported too. Engage — do now. The Engage tab filters Next Actions by Context, Energy (low / medium / high), and Time Available (<5m / <15m / <30m / <1h). Pull up the actions that match the moment you're in. REMINDERS THAT ACTUALLY WORK Due-date, defer-until, waiting-for follow-up, and weekly-review nudges fire as system notifications with action buttons — Done, Snooze, Move to Next Actions. Reminders survive reboots and app updates. Opt-in two-way calendar sync mirrors dated items into your system calendar. VOICE, PHOTOS, AUDIO Capture by voice. Attach photos or voice memos to any item. PRIVACY YOU DON'T HAVE TO THINK ABOUT - 100% on-device. SQLite under the hood. - No account, no servers, no analytics. - Crash reporting is opt-in and off by default. - Backup/restore as plain JSON: you own your data, you can take it anywhere. MATERIAL 3, LIGHT + DARK A sunrise-amber palette, slidable rows, accessibility-friendly text scaling and TalkBack labels. WHO IT'S FOR - GTD practitioners who want a clean, focused app that respects the method. - Anyone tired of cloud-syncing personal task data through someone else's servers. - People who want their tasks where their phone is — and nowhere else. Trayzero is an independent app inspired by the Getting Things Done methodology. It is not affiliated with, endorsed by, or sponsored by David Allen Company. "Getting Things Done" and "GTD" are trademarks of the David Allen Company.
F-DroidGitHub
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.
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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)
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T
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.
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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.
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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
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Turtle
APK
TurtleGraphics is a platform with a Pythonic language for learning and practicing CPU and GPU programming on mobile devices. TurtleGraphics began as a reimplementation of the classic Turtle Graphics environment for Android using a simple language. Over time, that language, Lilo, evolved into a platform featuring a heterogeneous Python-inspired language that allows targeting both the CPU and GPU within the same program, influenced by Python, Mojo, and CUDA. Features Free and open source with no ads or data collection. A Python implementation written from scratch with built-in GPU programming support and user-friendly error messages. Supports many modules from the Python standard library. Interactive preview for Turtle Graphics programs. Includes numerous examples demonstrating GPU programming, Turtle Graphics, and Python language features.
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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".
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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
Txori
APK
Built entirely in native Kotlin, Txori runs fully on-device, avoids tracking and no internet access.
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.
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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.
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