Productivity
1843 open source Productivity apps
Std Atmosphere
APK
A small tool for aeronautical engineering, providing a model of the standard atmosphere: that is to say the temperature and pressure as a function of altitude. Given a Mach number, you also get the true air speed and conventional air speed.
F-DroidGitHub
Step and Height Counter
APK
This app counts footsteps and elevation gain if step sensor and barometric sensor is available. All data is kept locally only, there is no connection to any server. For statistics you can save your data locally on SD-Card. Please note: Pressure sensor is mandatory. Steps will not be counted during walking, if there is a step sensor but no pressure sensor. Elevation gain should only be counted if footsteps are detected, so only stairs and hill climbing will count, but not elevators or lifts. Don’t expect high accuracy - due to the concept of the sensors the accuracy is limited. And: avoid walking in trains or subways with active measurement, as the pressure (and therefore height) can change significantly during driving. You can save regular and daily statistics automatically on SD-Card and save current values with the floating action button. Starting with Android 10 files are not saved to root-folder of SD-card anymore, but in app-directory. There isn’t much on graphical display of statistic data besides two progress bars. Just use any program which can read csv-values. Permissions: * Access to physical activity: Access to step sensor needs permission to access physical activity since Android 10+. The app will not work without this permission on devices with Android 10 and higher. * Keep device awake: Device will not be kept awake all time. It will be woken up regulary and kept awake if necessary for short time to ensure proper counting of steps and elevation gain. * Write to external storage: App will work without this permission, but you cannot save statistical values or markers.
F-DroidGitHub
Stepsy: Step Counter
APK
Stepsy is perfect for anyone who wants a simple, private way to track daily steps without unnecessary bloat. It’s a lightweight, battery-friendly Android app that uses your phone’s built-in sensors. It prioritizes simplicity, privacy, and full offline data storage.Stay active, monitor your progress, and hit your fitness goals — all through a clean, minimal interface with near-zero battery impact.Automatically calculate distance and calories burned based on your height and weightView your activity trends with dynamic, interactive chartsExport your data as a CSV for backup or analysisUse the home screen and lockscreen widgets to keep your step count front and center
F-DroidGitHubIzzyOnDroid
Stethox
APK
This is a Xposed Module that enables Stetho for every application on your phone. All Stetho functions are given besides Network Monitoring. For this however I highly recommend using mitmproxy or tcpdump and Wireshark. This Module can be used for Reverse Engineering. Especially the Layout Preview is very useful. Please also take a look at Inspackage since this will add even more functions for this purpose. ATTENTION:Never leave this Module enabled or installed on day to day use. THIS IS A SECURITY RISK. Only enable this for Development.
F-Droid
Stims
APK
Stims lets you select apps that should prevent your screen from turning off. When a stimmed app is active in the foreground, the screen stays on at full brightness. When you switch to a different app, the screen resumes normal sleep behavior. Select apps to stim from the list, tap "Stim Selected Apps", and a background service will monitor the foreground app and hold a wake lock whenever one of your chosen apps is active. Requires Usage Access permission to detect which app is in the foreground.
F-DroidGitHub
Stochastic Reminder
APK
Create and manage customized weekly fixed and random notifications. Features • Schedule weekly fixed and random notifications on specific time range. • Triggered on specific days of the week. • Specify both the title and long-form multiline message. • Specify the alarm type: sound, vibration, both or muted. • Use exact alarm for non muted notifications. • Use battery preserving scheduling on muted notifications. • Group same reminder notifications together to avoid cluttering. • Localizations available for french, italian, spanish and german.
F-DroidGitHub
Stopwatch
APK
This app provides a stop watch as quick tile. There's no launcher icon, just the tile. The notification is required for technical reasons. I recommend to mute notifications of this app.
F-DroidGitHub
StorageTrac
APK
Uses inotify to record any file activity in the external storage. Collects data at regular intervals and plots used storage space over time. Uses the GraphView library for plotting.
F-DroidGitHub
Streak
APK
A lightweight, super minimal, streak tracker built in C with rawdrawandroid. Log your daily habits and view your streak continuity. Add entries by clicking the + button, ↩ to undo, or manual input in Add Date.
F-DroidGitHub
Stride
APK
It allows creating and syncing tasks with any git provider (i.e. GitHub, GitLab, SourceHut, etc) or self-hosted server. WARNING: This is currently alpha, so everything is subject to change.
F-DroidGitHub
StudiPassau
APK
This app offers the following functions: » A complete timetable » Mensa plan with data from STWNO or OpenMensa » Files view » Room finder » News Many functions are still in planning/development. The entire app is open source: https://github.com/ThexXTURBOXx/studipassau Created and still maintained by a former student of the University of Passau.
F-DroidGitHub
Studiportal
APK
Mit dieser App werdet ihr immer sofort informiert, wenn neue Noten ins Studiportal eingetragen werden. Die App überprüft in einem festen Interval, ob neue Noten verfügbar sind (natürlich alles einstellbar). Ihr müsst nur eueren HFU-Benutzername und Passwort eintragen. Standardmäßig überprüft die App nur ob neue Noten vorhanden sind, wenn ihr mit einem WLAN-Netzwerk verbunden seid, das könnt ihr aber einfach umstellen wenn ihr wollt.
F-DroidGitHub
Study Tracker
APK
Note: This app is currently only available in Chinese. Study Tracker is a lightweight Android application designed to help you quantify your learning efforts. Organize your studies into hierarchical projects (e.g., courses, units), log your study time, and view your progress through intuitive statistics. Key Features: - Hierarchical project management. - Progress tracking with automatic completion calculation. - Statistical analysis with built-in charts. - Local storage using Room database for privacy and speed. - Modern UI with Jetpack Compose and Dark Mode support.
F-DroidGitHub
Stundenplan
APK
Timetable is an open source tool that clearly shows you your Untis timetable.Why Timetable?Set the colors of the subjects yourselfHide irrelevant coursesBeautiful designOpen sourceI am happy to accept feedback, error reports, feature requests, etc. on the issue tracker and by email to (laslo.hauschild (at) web.de).
GitHubIzzyOnDroid
Styrkur
APK
Styrkur is an easy to use, yet powerful tool to track your workout. Set up your own workout plan or use one of our predefined. There should not be a big step from writing your sets on a piece of paper to using an app. You will get a simple view of what you should do and how much you did the last time. With a built in timer you have full control over both your sets and your pauses. You get simple ways of keeping track of your progress. Styrkur offers both an simple list of your past sessions with your comments, and graphical view of your progress. Track your measurements, weight and muscle gain with a simple and charts.
F-DroidGitHub
Subsurface
APK
Companion app for the cross-platform Subsurface desktop app * Capture dive positions * Search and modify old dives * Synchronise dives with a server for manipulation in desktop app Recent versions require the non-free library Google Play Services library.
F-DroidGitHub
S
Subz
APK
Keep and eye on your subscriptions and contracts. Let you remind of cancelation periods. Add subscriptions and details like costs, billing interval, contract durations and cancelation period Show all subscriptions and their costs Show days until next billing Switch subscription cost overview to daily, weekly, monthly and yearly Modify and delete subscriptions Search for specific subscriptions Sort subscriptions by name, costs, etc. Optional reminder for reaching cancelation period of subscriptions
F-Droid
Sugarizer
APK
Developed for the "One Laptop Per Child" project, Sugar is a leading learning platform used by nearly 3 million children around the world. Sugarizer allow you to discover the Sugar Learning Platform from your smartphone or tablet. It includes a bunch of educative activities coming from Sugar.
F-DroidGitHub
Sumatora
APK
Sumatora has the following distinctive features: * very fast search and display of exact term/term at the beginning/term included * bookmarks and bookmark export/import * search selected text in applications using contextual menu (or sharing) * multilingual search (supports English, German, Russian, Spanish, Dutch, Hungarian, Swedish, Slovenian and French).
F-DroidGitHub
Summation
APK
Summation adds values from a list of items. Each item has a label and a number and multiple lists are supported.
F-DroidGitHub
Sun Time
APK
When the sun is at the highest point, it's noon, so it's 12:00 p.m., right? That's the way things should be. This app shows you the solar time at your location. 12:00 p.m. is natural solar noon, and the sun is at its highest point. 12:00 a.m. is the natural solar midnight, and the sun is at its lowest point. See solar time in comparison to your zone time in the main app, and see the solar time in a nifty widget. You can use this app to wake up at a solar time of your choosing.
F-Droid
Sunrise Signal
APK
* Track morning wood patterns for better health insights. * Log daily habits and lifestyle choices with ease. * Gain insights into sleep, stress and exercise patterns. * Interactive calendar to visualize data trends. * Biometrics and Passcode Lock. * Secure and private; all data stays safely on the device. * Open source, encouraging collaboration and innovation.
F-DroidGitHub
Suntimes
APK
Tracks sunlight and moonlight times. Features a clock, alarm clock, widget collection, and more. Suntimes displays rising/setting information for the sun and moon. It includes many features commonly associated with a world clock. The times reported by this app are approximate. The app doesn't require network connectivity, GPS is optional. Features: * clock * alarm clock * widgets * tiles Clock * current time (System, Apparent Solar, Local Mean, UTC, or Sidereal time). * time of sunrise, sunset, twilights (civil, nautical, astronomical), and blue/golden hour. * time of moonrise, moonset, apogee/perigee, moon phases and illumination. * time of solstices, equinoxes, and cross-quarter days. * day/night world map, yearly sunlight, and sun altitude graphs. Alarm Clock: * general purpose alarms; full screen alarms, notifications, and quick notifications. * daily repeating alarms for sunrise, sunset, or other reoccurring events. * bedtime alarms with support for sleep cycles and do-not-disturb settings. * gentle alarms that gradually change screen brightness, colors, and volume. * features for heavy sleepers; math problems, NFC tags (requires SuntimesNFC), and snooze limits. * automated actions; user-defined intents when alarms are triggered or dismissed. * other alarms; "roman time" alarms (Natural Hour), midpoint alarms (Interval Midpoints). The app benefits from the following permissions: * ACCESS_FINE_LOCATION is used to obtain the current position (latitude, longitude, altitude). * ACCESS_LOCATION_EXTRA_COMMANDS is used to configure GPS hardware. * ACCESS_NOTIFICATION_POLICY is used to change do-not-disturb settings at Bedtime. * BOOT_COMPLETED is used to restore active alarms after a reboot. * FOREGROUND_SERVICE is used to deliver alarms.. * POST_NOTIFICATIONS is used to deliver alarms.. * REQUEST_IGNORE_BATTERY_OPTIMIZATIONS is used to ensure reliable delivery of alarms. * SCHEDULE_EXACT_ALARM is used to schedule alarms.. * SET_ALARM is used to interact with the system AlarmClock app. * USE_FULL_SCREEN_INTENT is used to deliver alarms.. * QUERY_ALL_PACKAGES is used to configure and launch user-defined actions.. * VIBRATE is used by alarm notifications. With older devices: * READ_EXTERNAL_STORAGE is used to play alarm sounds located on the SD card (api≤=18 only). * WRITE_EXTERNAL_STORAGE is used to backup data to file (places, themes, etc) (api≤=18 only). Note: The "Calendar Integration" and permissions added in v0.9.0 were removed in v0.10.0. This feature is now available as a separate add-on app; Suntimes Calendars. Visit https://forrestguice.codeberg.page/Suntimes/ for more information.
F-DroidGitHub
Sunup
APK
UnifiedPush distributor using Mozilla's push server This application is a service to provide push notifications to applications supporting UnifiedPush. More information about UnifiedPush at https://unifiedpush.org .
F-DroidIzzyOnDroid