Phyros
Sauna and plunge timer
Only for Watch
Free
Apple Watch
Track sauna and cold plunge sessions from your wrist with clear timers, heart rate, hydration nudges, and a simple post-session summary.
Phyros is a focused Apple Watch companion for sauna and cold plunge routines. Start a free session, choose sauna, plunge, or both, and keep the important details visible on your wrist.
Track each mode with clear elapsed timers, switch between sauna and plunge with a tap or double tap, and see live heart rate during your session when Health permissions are enabled. Phyros can nudge you to hydrate during sauna time and gives you a simple summary when you finish.
Features:
Sauna and plunge session tracking
Optional sauna-only, plunge-only, or combined sessions
Large, glanceable mode timer and total session time
Live heart rate from Apple Health during workouts
Hydration reminder during sauna exposure
Haptic cues for transitions and reminders
Session summary with total time, sauna/plunge split, average heart rate, peak heart rate, and heart-rate trend
Phyros uses HealthKit only with your permission. It reads heart rate during active sessions and saves workouts so your session can be recorded in Apple Health.
Phyros is not medical advice. Use sauna and cold exposure safely and follow guidance from your health professional if you have any concerns.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Mark Stephens, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Mark Stephens
- Size
- 1.6 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Apple Watch
Requires watchOS 26.4 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Mark Stephens