Gambira: Chess Clock

Put the phone on the table and start the game.

The screen is split into two halves; each player ends their move by tapping their own half. For chess and other two-player games, with increment, delay, hourglass and handicap.

Two halves, one tap
In portrait the halves are stacked, with the upper one facing the opposite player; in landscape they are side by side. A player ends their move by tapping their own half; before the first move, Black starts White's clock.

Time control types
Increment (Fischer), delay (Bronstein), simple delay (US) and hourglass; the time added or held per move is entered in seconds.

Presets and handicap
Presets from 1+0 to 90+30 and a custom time. Players can be given different times (handicap).

Accurate timing
Time is measured with the device's precise clock; below 20 seconds, tenths of a second are shown.

Low-time warning
When time runs low, the player's half changes colour and a beep sounds; when time runs out, a clear notice is shown.

Game information
Each player's move count and the duration of the last move are shown; the game can be paused, reset with confirmation and the sides swapped.

Sound and vibration
Sounds are generated on this device with Web Audio; vibration on devices that support it. The screen stays on during a game.

Privacy
No account, no ads, no tracking. Your files and data stay on this device; no internet connection is needed.

Recent changes:
The first release of Gambira:
• Two halves, stacked in portrait and side by side in landscape; tap to move
• Increment, Bronstein, simple delay and hourglass
• Presets from 1+0 to 90+30, custom time and handicap
• Low-time warning, move count, last move time
• Sound, vibration; the screen stays on during a game
• No ads, no tracking, no account needed