A simple focus timer that helps you work deeply and rest wisely.

based on natural 90-minute sleep cycles and the average time it takes to fall asleep.

Why this works (Science, simply explained)

Human attention naturally moves in waves rather than staying constant. Research on focus shows that most people can maintain high-quality concentration for about 20–30 minutes before cognitive fatigue begins to build up.

Working in structured intervals (like the 25-minute focus block used in this tool) helps you stay in deep focus without burning out your brain. Short breaks allow your nervous system to reset, reduce mental strain, and improve overall productivity across the day.

What the timer assumes

The brain performs best with repeated cycles of focus + rest

One focused work session ≈ 25 minutes

One recovery break ≈ 5 minutes