Free online digital chess clock with Fischer increment, simple delay, sound effects, and tournament presets for Bullet, Blitz, and Rapid.
Fischer increment adds a specified number of seconds to a player's clock immediately after they finish their move, preventing rapid losses purely due to lack of physical execution time.
In Delay mode, your remaining time never increases beyond its current value. The clock simply pauses for a few seconds before ticking down, whereas Increment permanently adds bonus seconds.