Chess Clock: questions and honest answers

Four timing modes: Sudden Death, Fischer Increment, Bronstein Delay and Simple Delay (US delay). Blitz 3+2, Blitz 5+0, Rapid 10+0 and Classical 90+30 are built in, and you can save your own with any base time up to 180 minutes 55 seconds and an increment or delay of 0 to 60 seconds.

No. Every reading is computed from timestamps rather than counted ticks, so a call or switching apps cannot gain or lose time. The running clock still counts while you are away, the same as a physical clock would, so pause before you step out, not after.

A tap on the half whose clock is not running does nothing, so most wrong-half taps need no fix. If the player on move tapped by mistake, the undo icon reverses that tap: time, move count and turn. Undo goes back one step only.

Yes. The far player's half is rotated 180 degrees, so each player reads their own time the right way up from their side of the board. Each half also has its own move counter.

No. It is a clock for over-the-board play: it times turns and counts moves. It does not see the pieces, detect checkmate or record notation.

The four timing modes, the presets, your own saved controls and the game history are all free. There are four board themes and four flag sounds in total; Classic and Classic Beep are free, and Pro adds the other three of each (Walnut, Marble, Neon; Wood Clack, Bell Chime, Digital Blip) and removes ads.

No. The clock screen has no banner and full-screen ads never appear while a game is on screen. In the free version a full-screen ad can follow a finished game, and one can appear when you return to the app, at most once every 4 hours.

That half turns dark red with FLAG, the opponent is shown as the winner on time, the flag sound plays once if Sound is on, and the game is saved to History. The app cannot tell whether the position should be a draw instead; settle that with your opponent or the arbiter.

It is meant for casual and club play. Tournaments normally use the organiser's own clocks and rules, so ask the arbiter. It also cannot run multi-stage controls such as 90 minutes for 40 moves followed by extra time.

No. Both players always get the same time control, so time odds for a stronger player are not possible.

The first tap on either half starts White's clock, so in practice Black can press to start it, as in over-the-board play. There is no option to have Black move first.

Only games that end on time are saved on their own. When you leave with the X, you pick a result to save the game or choose Discard Game. Reset and games with no completed move are not saved.

The home list shows Resume Unfinished Game, which reopens it paused at the stored times. The move times from before the interruption are not carried into History, and time that passed after the app went to the background is not counted.

No. History stays on your device and there is no export, sharing or PGN. You can attach notes and photos of your scoresheet to each saved game.

Only if you tap Add Location on a saved game, to note where you played. It takes one reading and stops. It is never used during a game.

No. Each accepted tap gives a short vibration if Haptics is on, and the only sound is a single alert when a flag falls. You can turn that alert off with the Sound switch in Settings.

Yes, for any game where two players take turns. The fields say White and Black but you can type any names, and each player gets their own time bank.

No. The app uses a dark appearance only, which also keeps the display easy on the eyes across a table.