Focus
Short Break
Long Break
25:00
A free 30-minute timer, one tap to start. Half an hour is the all-purpose block: enough to make real headway on something, whether that is work, study, exercise, or chores, without committing your whole afternoon. It is also about the cadence at which it pays to get up and move.
A solid chunk of reading, problem-solving, writing, or admin in one timed block, long enough to finish something meaningful.
Half an hour is a realistic, repeatable length for a home workout or a run: long enough to count, short enough that you will actually do it.
Set 30 minutes and tackle one job on the list. A clear limit stops a quick tidy expanding to fill the whole day.
Time a batch-cook or a meal-prep session so it stays a session, with a clear end, rather than taking over the evening.
Half an hour is the most versatile length there is. It is long enough to make real headway, a solid chunk of focused work, a proper study session, a workout that counts, and still short enough to hold your attention the whole way through. For studying in particular, thirty minutes sits comfortably inside the 20-to-40-minute window the research points to for focused learning[1], so it doubles as a genuine study block, not just a general one.
If you take one habit from this timer, make it this: do not sit for much longer than half an hour at a stretch. A few minutes of brisk walking after about 30 minutes of sitting measurably sharpens your attention for what comes next[2]. When it rings, stand up, even for two minutes, before you start the next block.