ChessUnlock

ChessUnlock is a focus-first app locker that helps you reduce distractions while improving at chess.

Choose the apps you want to lock. When you try to open a locked app, ChessUnlock blocks it with a full-screen lock overlay. To unlock, solve a chess puzzle powered by the Lichess puzzle API.

Key features

Lock selected apps until you solve a chess puzzle

Choose puzzle difficulty

Timed breaks, 24-hour unlock, or indefinite unlock options

Auto-checks your moves and plays the opponent’s replies

Tracks simple progress stats (like puzzles solved)

Permissions notice (why they’re needed)
ChessUnlock uses Usage Access and an overlay to detect locked apps and display the lock screen. A foreground service may run to enforce locks reliably, especially when a break expires.