20 Minute Timer — Fullscreen Flip Clock
Preset and ready — press start, no signup needed.
Twenty minutes is the classic power-nap length — long enough to recharge, short enough to avoid grogginess. It's also a great focused-study block and the interval behind the 20-20-20 eye-strain rule.
The clock opens preset to 20:00 and starts on one tap. Big flip digits make it easy to check at a glance without breaking your flow.
Tip: For a power nap, set 20 minutes and lie down right away — the goal is rest, not deep sleep. The chime will bring you back gently.
Twenty minutes, three different ways
- As a nap: lie down as the clock starts rather than after ten minutes of settling. Twenty minutes keeps you above deep sleep, which is what makes waking painless.
- As a study block: twenty minutes suits memorisation and review far better than it suits writing — long enough for a full pass through a deck, short enough to stay sharp.
- As the 20-20-20 rule: every twenty minutes, look at something twenty feet away for twenty seconds. Run this on a second screen and let the chime be the reminder.
Twenty is the longest nap you can take without sleep inertia and one of the shortest blocks that still feels like real work — which is why the same number shows up in completely unrelated advice.
Frequently asked questions
Why is 20 minutes ideal for a nap?
It lets you rest and recharge without dropping into deep sleep, which is what causes post-nap grogginess.
Can I keep the screen on during the countdown?
Yes — run it fullscreen and the flip clock stays visible the whole time.
Does it need an account?
No. It's free to use immediately; accounts are optional and only for saving your history.
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Looking for the Pomodoro cycle timer, meditation guides, or streak tracking? Open the full FlipFocus app.