Cost / License
- Free
- Open Source (MIT)
Application type
Platforms
- Android
- F-Droid
Germany
EU




Simple Chess Clock is what its name implies: a chess clock (that’s simple!). It aims to be easy to use and easy to read, while also providing some reasonably expected features.

Privacy Friendly Sudoku is a logic puzzle game. The goal is to fill the complete board with numbers. Every number may only occur once in every column, row and subsection.



A time tracking app that respects your privacy and gets the job done without getting too fancy.



OI File Manager allows you to browse your SD card, create directories, rename, copy, move, and delete files. It also acts as an extension to other applications to display "Open" and "Save" dialogs.



QuickWeather is really fast. Just open the app and see the weather right now. There's no loading screen and no wait time. The weather is delivered to you with no extra junk, just clean and clear information.
This application allows to create lists of tasks which can be individually managed. Each list contains a set of tasks. Each task can have a deadline, a reminder time and a list of subtasks. By setting a reminder time the user will be informed by a notification.



Yokatta© is an open-source flashcards based language learning app using spaced repetition. The algorithm is heavily influenced by SuperMemo's SM-2 and follows best practices using Android Architecture Components provided by Google.

Privacy Friendly Ruler turns the device screen into a ruler for quick measurements on the go. It can display rulers with either inch or centimeters as metric. Furthermore, it can display a protractor.



The Privacy Friendly Torchlight application uses the smartphone’s flash light in order to provide the functionality of a simple torchlight. It belongs to the group of Privacy Friendly Apps.







Tired of music players that take forever to start up because they're loading ads or trying to download stuff? Of music players that ignore Bluetooth controls, or stop responding after a few minutes? I was too, so I wrote this app!
Offline vector maps support hiking, cycling, skiing, off-roading; enables track recording and background navigation; map filtering, custom places, terrain contours.




Brethap is yet another meditation app (yama). Including a timer for meditation, it also allows you to configure a breathing pattern for you to follow. Your sessions will be saved, allowing you to monitor and view stats about your progress in either a list or calendar view.


Save on Device adds an option to the Android Sharesheet that allows you to save files to your device.



A offline and online Flutter Whiteboard with collaboration Features. Maintained in my free time. Currently demo is offline.



An android application that helps you keep track of your shopping list that has a compare the price per unit of different items and shows you the best one to get.



CityZen is an open source Android app that helps you navigate and explore your city easily. With CityZen you find points of interest (POIs) such as ATMs, gas stations, drugstores, mobile phone stores and other interesting services near you.


