Go-clock

A clock dedicated to go games when no physical clock is available.

Minimalist and straightforward, the app supports all standard time systems:

Byoyomi — main time + overtime periods
Canadian — main time + moves in overtime
Fischer — increment added after each move
Absolute — sudden death
Pre-configured tournament presets are ready to use and fully customizable. The dual-screen layout lets both players see their time clearly from opposite sides of the board.
Resume mode lets you continue a game when a clock runs out of battery or breaks mid-game. Configure the exact remaining time for each player — including overtime state, periods left, and moves played — and pick up right where you left off.