39-Minute Timer

A free, no-signup 39-minute timer that runs in your browser. Best for deep-work intervals — papers, design sprints, hard problems.

Start the 39-minute timer →

When to use a 39-minute timer

39-minute blocks suit deep work — coding, writing, design, research. Long enough to load a hard problem into working memory.

How to run it

1. Pick ONE task. Write it down.
2. Open Promodify, set the focus length to 39 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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