45 Minute Timer
Forty-five minutes mirrors the length of a standard school class period, a therapy session, or one half of a football match. It's a natural block for focused deep work — long enough for flow state, short enough to avoid burnout. Use a 45-minute timer for baking bread, running a structured meeting, or completing an extended yoga or Pilates session. Research on ultradian rhythms suggests that the brain naturally cycles through roughly 90-minute periods of high and low alertness, making 45 minutes the ideal halfway focus point. This free timer runs in any browser, stays accurate in background tabs, and sounds an alarm when done.