Cluster · Countdowns & intervals

Timers.

Two timers for two different jobs. One counts down once, in digits big enough to read from the back of a room. The other repeats work and rest until the rounds are done. Both keep real time when the tab is in the background, which is where most browser timers quietly drift.

• Instrument

  Classroom Timer

  One fullscreen countdown with huge digits, quick presets and a gentle chime — built for a projector.

• Instrument

  Interval Timer

  Repeating work and rest rounds: Tabata at its real 20/10/8, EMOM, or intervals you set yourself.