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.

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.



This is a native music player for Android devices that connects to Jellyfin media servers. The code is based on a relatively recent version of Phonograph and was made for personal use, but contributions are welcome!








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.



NoLauncher is an extremely lightweight and minimal launcher for Android inspired by OLauncher Light, and OLauncher in general. It is very barebones and aims to provide only the most basic features.



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.



The main focus of this project is to create a music player that is optimized for speed (even with large music libraries).




Funny round based single/multiplayer game for awesome times. Very new, challenging and addictive.




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.




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











Android app which adds an always on display. Free, no ads and open source.





Open-source Android email client focused on privacy with minimalist design and features like multi-account support, unified inbox, and encryption.


Free and open-source music streaming Android client for Subsonic API compatible servers - ultrasonic/ultrasonic



