90 Minute Focus Timer for deep work

For big tasks, a 90 minute focus block can be the sweet spot. Koa's free timer opens below with 90 minutes of focus and a 20-minute break.

Start the 90/20 timer now
Free · no account · no ads

How it works

Click the button: the timer opens set to 90 minutes focus, 20 minutes break.
Write your task in the little field and press Start.
After 4 rounds Koa suggests a long break (30 minutes).

90/20 suits essays, projects, coding and practice sessions, when you already get into flow easily. If you check your phone after 20 minutes, start with 25/5 instead.

Koa's tips

Pick your hardest task for the 90 minutes.
Have water and snacks ready before you start.
Two 90-minute blocks a day is a lot. One is great.

Questions

Why 90 minutes?
The idea goes back to research on roughly 90-minute rest-activity cycles and expert practice sessions. Treat it as an upper limit, not a rule.

Is it free?
Yes, free with no account.