Need help with Chess Clock? We’re here to assist.
Yes! Chess Clock is free on iOS. No account needed, no ads.
All major time controls: Blitz, Rapid, Classical, Fischer increment, Bronstein delay, Byoyomi (Japanese go), Canadian, Hourglass, and custom. Multi-stage controls are supported.
Start a game on iPhone, tap the share icon to get a 6-character code. Share the code — spectators enter it at chess-clock.app/app/join and watch the clock in real time. No account required.
Spectators with an edit code can press the clock and pause/resume. Spectators with a view code can only watch.
Yes — Byoyomi and Canadian byo-yomi are fully supported on iOS.
Yes. The clock runs fully offline on iPhone. Live Sharing requires internet, but the clock itself does not.
Submit ideas, vote on features, and see what’s coming next.