10+5 gives each player 10 minutes plus 5 seconds per move, a common rapid control; FIDE counts games with 10 to 60 minutes per player as rapid. 15+10 is also built in, and the increment can run as Fischer, Bronstein or simple delay.
How to use
- Tap the settings button and pick Simple, Basketball, Volleyball, Table tennis, Badminton, Darts 501 or Cards. Set the number of teams and their names.
- Tap a team's big number to add a point. Use − to take one back and the extra buttons for +2, +3 or your own steps.
- Tap the game clock to start or stop it. Tap the shot clock to reset it to 24, or the small button for 14.
- For the chess clock, choose a time control, then tap your side after each move to start your opponent's clock.
- Scores, settings and the history are saved in this browser and stay on your device. Each sport keeps its own game, so switching between them loses nothing.
- Right-click or long-press a score to take a point away. Every change is listed in the history, and Undo steps back through it.
- Volleyball, table tennis and badminton count sets or games for you: win by two, the shorter deciding set in volleyball, the badminton cap at 30 and who serves next.
- Darts: type the total of each turn and press Enter. A turn that would leave less than zero, or 1 with double out, is a bust. Finishes are suggested from 170 down.
- Chess clock: Fischer adds the increment after each move. Bronstein gives back the time you used, up to the increment. Simple delay waits that many seconds before your time starts to run.
- The screen stays on while a clock runs and in full screen, if your browser allows it.
Reading a time control
A time control such as 3+2 means 3 minutes per player plus 2 seconds per move. Bullet is usually under 3 minutes, blitz up to 10, rapid 10 to 60 (the FIDE definition) and classical longer. With an increment the total grows with the number of moves: in 15+10 a 40-move game gives each player 15 + 400/60, about 21.7 minutes.
Fischer, Bronstein and simple delay
Fischer adds the full increment after every move, so you can bank time by moving fast. Bronstein gives back the time you actually used, up to the increment, so your clock never grows above where it started the move. Simple delay waits a few seconds before your clock starts running.
Delay methods are common in US tournament play; online servers and most FIDE events use Fischer increment.
Over the board
Place the phone between the players, each side facing its owner. The display turns so both can read it, the side to move is highlighted, and under 20 seconds tenths appear. Undo corrects a press made by mistake, and the screen stays awake while the clock runs.
Frequently asked questions
How do I use an online chess clock?
Choose a time control, then the player with Black taps first to start White’s clock. After each move, tap your own side (or press Space) to stop your time and start your opponent’s.
What does 3+2 mean in chess?
Each player starts with 3 minutes, and 2 seconds are added after every move they make. It is one of the most popular blitz controls.
What is the difference between increment and delay?
Increment (Fischer) adds time after each move. Delay (simple or Bronstein) does not let your clock gain time; it only shields the first seconds of each move from counting down.
What happens when time runs out?
The clock flags that side with an alert and stops. Whether the game is lost on time still depends on the rules you play, for example insufficient mating material.
Can I pause the chess clock?
Yes. Press pause to stop both clocks, for example to call an arbiter, and resume when ready.