Chess Clock

Time games of over-the-board chess

eu.fortysixandtwo.chessclock

Chess Clock is a simple application to provide time control for over-the-board chess games. Intended for mobile use, players select the time control settings desired for their game, then the black player taps their clock to start white's timer. After each player's turn, they tap the clock to start their opponent's, until the game is finished or one of the clocks reaches zero.

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Screenshots

The main screen, showing timers for the white and black players of a chess game

The main screen in a portrait aspect ratio, showing one timer rotated 180 degrees

Observed history

App	Change	Version	When ↑
Chess ClockEvangelos Ribeiro Tzaras	updated	`0.6.3`	5d ago11 Oct 2026

Upstream releases

Release notes supplied by the developer. These dates are not Flathub package publication times.

0.6.310 Oct 2026

Runtime update and translations

Update to GNOME 51 runtime
Add brandcolors and maintenance updates, thanks to Brage Fuglseth
New and updated translations.

0.6.231 Oct 2025

A bugfix release under new maintainership.

Fix timer display in RTL languages, thanks to Yosef Or Boczko
New and updated translations.

0.6.113 Sept 2024

A bugfix release under new maintainership.

Thanks to Clara Hobbs for creating Chess Clock!
Fixed the timer not correctly counting down to zero, thanks to Michael Evans.
Declare as compatible with mobile and workstations.

0.6.027 Sept 2023

A new release bringing adaptivity refinements and alert sounds.

Thanks to Mariko Ueno, we now have alert sounds when a player's timer runs low. These can be muted if desired via the menu.
The window adapts better to portrait aspect ratios and large screen sizes, enabling improved tablet support.