Sauna Flow: Sauna Timer & Log

Your personal sauna coach on your wrist — build a smarter sauna routine on your own heart rate.

Stop guessing how long to stay. Sauna Flow shows your current heart rate zone in real time on your watch, then turns every session into data you can track over time.

■ How it works
1. Set your target time in the app and start your session. Follow your live heart rate zone on your Apple Watch.
2. Follow your live heart rate zone — Warm-up, Detox, HSP — right on your wrist.
3. After the session, review your Load Score and Stability Score on your phone. Sessions sync to your health app automatically.

■ Highlights
- Real-time heart rate zone tracking on your watch, from Warm-up to HSP, with alerts when you reach your target zone.
- Session analysis with Load Score and Stability Score, plus long-term stats to track your routine.
- Health app integration: sessions and heart rate data are saved to Apple Health automatically. Apple Watch app included.
- Dark-mode interface designed for low-light relaxation environments.

■ Please note
- Sauna Flow is not a medical device and does not provide medical advice.
- If you have a cardiovascular condition or other health concerns, consult your doctor before using a sauna.
- Stay hydrated and avoid overheating. Stop your session immediately if you feel unwell.
- Apple Watch and iPhone are not designed for extreme heat. Do not expose your device to sauna temperatures beyond its operating range (Apple Watch: 0–35°C / 32–95°F); keep it somewhere safe. Protecting your device is your responsibility.