ChessCraft is a chess variant AI sandbox, with online play and sharing. The full game is free and ad-free, the revenue model is patronware IAP. This has been my passion project for three years, first on Google Play and now released on Steam mid-December. This month was my first with about 500 in income.

https://www.chesscraft.ca

https://blog.stuartspence.ca/chesscraft-is-patronware.html