ChessLab is a chess companion app for iPhone and iPad: play against the Stockfish engine, analyze games and positions, train openings and tactics puzzles, and experiment — all fully offline, with no account and nothing sent off your device.
ChessLab is an independent, one-person project provided as-is. There is no formal support service, no guaranteed response time, and no SLA of any kind.
Any feedback or suggestions aimed at improving the app are genuinely welcome — the developer reads everything and appreciates hearing from users. If you encounter a bug or an unexpected issue, you are welcome to reach out by email. Please include your iPhone (and Apple Watch) model, iOS version, and a short description of the problem.
There is no guarantee of a reply, but all reports are read and genuinely appreciated — they help improve the app for everyone.