30-day free trial with every feature, then a one-time code for 4.99 EUR at dialforge.dev. No subscription. Dry breath training: breath-hold tables you can read without glasses. The time fills almost half of the screen in thick white or yellow digits on pure black, so you can see it lying on a mat or sitting at a table. - Static max: a stopwatch for your longest hold, best result saved - CO2 table: 8 rounds, hold at 50% of your best, rest from 2:00 down to 0:15 - O2 table: 8 rounds, rest 2:00, hold growing from 40% to 75% of your best - Custom table: your own rounds, hold and rest - Every percentage and your personal best can be changed. The 40 to 75% O2 range is only a training suggestion, capped at 75% - Phase shown three ways: a big word (BREATHE, READY, HOLD), the colour of the bottom bar and a different vibration - Vibration at the start of a hold, at half time, 10 seconds before the end and at the end; 3-2-1 before each hold. Sound is optional and off by default - Buttons only during a session, touch is ignored. START pauses, BACK twice opens a menu - An unfinished table is kept when the app closes and comes back paused Safety: train with a safety partner. Never train alone. No hyperventilation. Stop at any discomfort. The app shows this warning at first start, in the menu and before every O2 table. This is a timer, not a medical device. It does not measure oxygen or your body, and it does not tell you what is safe. Ask a qualified instructor before table training. English and Polish. Bugs or ideas: the form at dialforge.dev. Free trial: the app works fully and for free for the first 30 days. After that you can buy a one-time code at dialforge.dev. Changing your watch? Write to me and I will move your code for free. No subscription. I am a student and I build these apps myself after hours. I do not own every watch model, so bugs can happen on some. If something does not work or is missing, write through the form at dialforge.dev. I fix every reported bug within 72 hours and send the update to Garmin (Garmin approval usually takes 1-3 days). If you reported a bug, check whether the fix is already there, and if the bug lowered your rating, I would be grateful if you reconsidered it. If the app is useful to you, leave a rating in the store. You can also buy me a coffee or buy the full version, it lets me build more. Purchase: at checkout you confirm immediate delivery of the code, so under EU law the right of withdrawal does not apply. If the app does not work on your watch as described, write to me and I will refund you.

First release.