Offline game clock for go
Byo-yomi timing, built for real boards.
Go Clock Pro is a paid, offline iPhone clock for go, baduk, weiqi, and igo. It has no accounts, ads, analytics, tracking, or in-app purchases.
Time systems
The app supports Japanese byo-yomi, Canadian byo-yomi, Fischer increment, absolute timing, and editable custom presets for casual play and tournament-style practice.
Local first
Presets, settings, onboarding state, tournament lock state, and the latest resumable game snapshot stay on the device.