20 minute timer for a nap or a sprint
A 20 minute timer is long enough for a nap or a sprint and short enough to finish. Leave it on an iPad or a spare monitor so the end stays visible.
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A short block you can see
Twenty minutes is a power nap, a writing sprint, or a meeting that was supposed to be short. It is long enough to do a real slice of work and short enough that you can see the end without checking a clock. Put the timer on an iPad beside the sofa or on a spare monitor, and leave the laptop you are using free. A nap should stay at or under this length for most people, and a visible countdown is a kinder alarm than a phone under a cushion. Keep the volume high enough to hear, and keep the device awake. A locked screen cannot play the chime. A sprint uses the same page: one paragraph, one inbox pass, or one problem, then stand up when it ends. A short meeting can start the countdown where everyone can see it, so the last minutes are a shared fact instead of one person watching a laptop. This page opens at twenty minutes. Add five if the slot runs long, or jump to the fifteen or twenty-five minute pages if the block is the wrong size. The progress ring shows the same fact as a shape when the numbers are hard to read from the sofa.
FAQ
Is twenty minutes a good nap?
It is a ceiling more than a target for many people. Set it, keep the device awake, and keep the volume high enough to hear from the sofa. A locked phone will not ring. This page only rings while it is open. If you want a shorter nap, the ten or fifteen minute pages are the same layout.
Can a meeting share this timer?
Yes. Start it where everyone can see it, fullscreen, and pause only if the group agrees to continue. A shared screen is more neutral than one person saying they have to go. Reset when the next item starts so the next twenty minutes is a clean block.