Time a chess game on one device

A physical clock is one more thing to carry. Presets from bullet to classical plus increments turn a phone into the clock.

Tools used in this guide

The job

Casual chess still wants a clock — otherwise the losing side can stall forever. The convention: press your side after your move, your opponent's clock starts.

Set the control

Pick a preset — 1+0 bullet through 30+0 — or type a custom "minutes+increment" like 5+3. The increment adds seconds back each time your turn ends.

The first press starts the opponent's clock, so whoever faces the white side presses nothing first.
Pause stops both clocks — resume picks up the side that was running.

Worked example

10+5 rapid: each player starts at 10:00. White presses after each move, adding 5 s back. The display shows move counts, so flagging disputes settle themselves.

Scope

This is a device-clock timer — accurate enough for casual play, not certified for tournament arbitration. When a flag falls the clock announces it; it doesn't adjudicate the game.

Works offline once loaded — nothing is sent anywhere.