Sauna & Recovery
Schwitz tracks every phase of your sauna session — heat, cooling, rest — with live heart rate on Apple Watch and recovery insights after every round.
Schwitz is a sauna and recovery tracking app for iPhone and Apple Watch. It records every round of your sauna session — heat phase, cooling method, and rest interval — alongside live heart rate data. After each session, Schwitz shows your peak heart rate, recovery HR, and calorie burn, synced directly to Apple Health.
Most people who sauna regularly feel the difference — but have no idea what's actually happening.
How high did your heart rate go? Did you cool down long enough? Was this session more or less intense than last week?
Schwitz gives you the data — without turning your ritual into a workout app.
Pick your sauna
Choose your preset: Finnish, Infrared, Steam, Smoke, or Bio. Set the temperature and location. Schwitz saves it for next time.
Track every phase
Switch between heat, cooling, and rest with one tap — on iPhone or directly from Apple Watch. Log your Aufguss. Set a heart rate alarm so you never push too far.
Review your recovery
See your HR curve, peak and recovery heart rate, rounds completed, active calories, and HRV delta. Everything written to Apple Health.
Phase-level precision
Schwitz doesn't just time your session — it tracks each heat phase, cooling method (cold plunge, cold shower, fresh air, none), and rest interval separately. You'll know exactly what happened and when.
Live heart rate on Apple Watch
Real-time HR during every phase, directly on your wrist. The optional HR alarm alerts you — via haptic and sound — when you cross your threshold.
Recovery metrics that matter
Peak HR, recovery HR, HRV delta, and active calories. All synced to Apple Health at the end of your session. Available for export with Schwitz Pro.
Sauna journal
After each session: log your mood, add notes, see your rounds and Aufguss count. Simple and honest — without scoring you.
Schwitz is for people who sauna regularly and want to understand what's happening in their body.
You don't need to be a biohacker. You just need to care about doing it well.
If you follow a deliberate heat exposure protocol — 2–4 rounds of 10–20 minutes, with cold cooling in between — Schwitz is built exactly for that.
Deliberate heat exposure is the intentional use of sauna or heat therapy to produce specific physiological responses — including elevated heart rate, heat shock protein release, and cardiovascular adaptation. Research by Dr. Rhonda Patrick and others suggests regular sauna use (4–7 sessions per week) is associated with reduced cardiovascular risk, improved mood, and faster recovery.
Aufguss is a sauna ritual where water infused with essential oils — eucalyptus, lavender, mint — is poured over hot stones and fanned through the cabin to intensify heat and humidity. Schwitz logs Aufguss events per round so you can see patterns across sessions.
No. You can track full sessions on iPhone alone. Apple Watch adds real-time heart rate monitoring, the configurable HR alarm, and haptic phase reminders.
Yes. Heart rate, active calories, and workout records are written to Apple Health at the end of every session.
Finnish, Infrared, Steam, Smoke, and Bio. Each session stores the temperature, location, and sauna type as a snapshot.
Schwitz is free with unlimited session tracking. Schwitz Pro (€2.99/month or €19.99/year, 7-day free trial) adds advanced analytics, heart rate recovery analysis, CSV export, and Apple Watch complications.
Download Schwitz for free. Unlimited sessions, Apple Watch live tracking, and Apple Health sync — included from day one.