Sauna App counts your sauna rounds and shows what matters at one glance: heart rate, breathing rate, watch temperature, time in the current round and total time. Press START when you arrive (the visit opens with a break), LAP/BACK to switch sauna ↔ break, START again to save. Four screens: live, sauna totals, break totals with the heart-rate drop after leaving the sauna and the post-sauna peak, and the last sauna with a heart-rate chart. Big numbers sized for every display, readable in a hot room. Saved to Garmin Connect as a "Meditation" activity named "Sauna" with one lap per round, breathing and temperature charts and summary fields (entries, sauna time, breaks, break time, max temperature, max heart rate, average breathing, peak heart rate after the sauna). History of the last 30 visits on the watch. Touch is off by default on watches with UP/DOWN buttons (wet fingers, towels). On Venu and vívoactive swipe up/down to turn the screens and hold the screen for the menu. Two free trial days (24 h each, activated on the watch, phone needed once). Then a one-time unlock code from saunaapp.pl (EUR 5, no subscription), tied to your watch ID shown on the Licence screen. The phone is not needed during the sauna. Important: Garmin watches are not designed for sauna use. Garmin rates them for operation up to 60 °C, while sauna air is usually 80–100 °C. Heat and steam can damage the watch, its battery or seals and may void the warranty. You use the watch and this app in a sauna entirely at your own risk; the author accepts no liability for any damage to the watch or for health consequences. The temperature shown is the watch's own sensor, not the sauna air. This app is not a medical device. Not affiliated with Garmin.

New: a "New record!" screen. When a saved visit beats your longest sauna, longest visit or most saunas in one visit, the watch vibrates three times and shows a trophy with the new values instead of closing. Any button closes it. Nothing else changes.