Apno

Train your breath. Expand your limits.

A free, open-source apnea training app for freedivers, spearfishers, and anyone looking to improve their breath-hold capacity.

Training Programs

Fixed hold time with decreasing rest periods. Trains your body to perform with less oxygen.

Increasing hold time with fixed rest periods. Builds tolerance to carbon dioxide buildup.

Open-ended breath holds at your own pace. A simple timer with contraction tracking.

Session history with a heatmap calendar. See your training consistency at a glance.