Apnea Trainer
freeFree and without an account — if you like, you can support the project voluntarily.
Holding your breath longer can be trained on land for the most part. The apnea trainer converts CO2 and O2 tables to your own best time and guides you through the session — block by block, with a timer and announcements.
Seven grades lead from the first attempt to competition level. Moving up does not depend on times alone: each grade has a test, and without it you go no further. There is also an exercise library and a knowledge section on the diving reflex, blackout and samba, the buddy system, equalising and equipment.
Your training record can be saved to a file and restored on another device. There is no account and no server — the data leave your device only if you export them yourself.
Before you begin
This app does not replace apnea training instruction. It contains exclusively dry exercises for training on land — no timer ever starts a breath-hold in water.
- Apnea training in water never takes place alone. A blackout gives no warning and happens silently. Without a trained partner within reach it is fatal.
- Practise sitting or lying down — not standing, not in water, not in a car.
- Hyperventilation before a breath-hold is dangerous: it pushes back the urge to breathe, not the loss of consciousness. The app deliberately offers no such protocol and explains why in the knowledge section.
- With cardiovascular disease, epilepsy, lung conditions or during pregnancy, seek medical advice first.
What you get
- Gradesseven, from beginner to competition level
- TablesCO2 and O2, calculated from your own best time
- Exercises14 in four categories
- Water sessionsnone — training on land only
Technical
Runs entirely in the browser. Your progress stays stored on your device and is transmitted nowhere — no account, no sign-up, no advertising, no tracking. Via the share menu the app can be added to your home screen; after that it works without an internet connection too.
Support
This app is free and stays free. If it has been of use to you, a voluntary contribution helps to build the next one.
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