Privacy Friendly Sudoku

PFA GitHub

Get it on F-Droid Get it on Google Play

Privacy Friendly Sudoku is a logic based game. This app belongs to the group of Privacy Friendly Apps developed by the SECUSO Group at Karlsruher Institute for Technology (KIT). It is optimized regarding the user’s privacy. It doesn’t use any tracking mechanisms, neither it displays any advertisement. Also it does not use any permission, as the app can provide its full functionality without the usage of permissions.


Privacy Friendly Apps are group of Android applications which are optimized regarding privacy. Further information can be found on


Further development requires Android Studio, we recommend to use the latest version.

API Reference

Mininum SDK: 16
Target SDK: 29


Privacy Friendly Sudoku is lisenced under the GPLv3.
Copyright (C) 2016-2018 Christopher Beckmann and Timm Lippert
Copyright (C) 2018-2021 Christopher Beckmann

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see

The icons used in the nagivation drawer are licensed under the CC BY 2.5. In addition to them the app uses icons from Google Design Material Icons licensed under Apache License Version 2.0. All other images (the logo of Privacy Friendly Apps, the SECUSO logo, the splash screen logo and the header in the navigation drawer) copyright Technische Universtität Darmstadt (2016-2018) and Karlsruhe Institute of Technology (2019-2020).

The icons ic_trophy_award_black_48dp and ic_trophy_black_48dp are licensed under the Sil Open Font License Version 1.1.


App-Icon: Markus Hau