Box Breathing par Pierre

Box Breathing is a simple breathing exercise used to reduce stress and improve focus.

How it works — 4 equal phases:
- Inhale — slowly breathe in
- Hold — keep the breath
- Exhale — slowly breathe out
- Hold — pause before the next breath

Features:
- Choose your pace: 3, 4 or 5 seconds per phase
- Cycle counter and elapsed time
- Smooth animated circle guides your breathing
- Works fully offline — no account needed