87-Minute Timer

A free, no-signup 87-minute timer that runs in your browser. Best for ultradian deep-work blocks — your body's natural focus rhythm.

Start the 87-minute timer →

When to use a 87-minute timer

87 minutes is a deep-work marathon. Use it for high-stakes work like exam prep, architecture, or one-sitting essays. Pair with a longer break after.

How to run it

1. Pick ONE task. Write it down.
2. Open Promodify, set the focus length to 87 minutes.
3. Phone in another room. Start the timer.
4. When the bell rings, stop. Take a proportional break.

Related timers

• 15-minute timer
• 20-minute timer
• 25-minute timer
• 30-minute timer
• 45-minute timer
• 60-minute timer
• 90-minute timer

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