Three chess apps by one author. Each has its own privacy policy, because each handles a different amount of your data — and two of them handle almost none.
A chess coaching platform: a live lesson with a shared board and voice, homework, progress tracking and a report for the parent. An app for the work of a chess trainer.
Puzzles built on how the pieces move: capture everything, avoid what is attacked, hunt the king. Over 18,000 puzzles, free, with no advertising and no account. Published on Google Play.
Practice holding the board in your head: moves without a board, from a single square to a whole game.
Contact and support — one address for all three apps.