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  1. v2.0.3iOS
    Our Biggest Update Yet!
    
    > New AI Coach with trend summaries and per-session insights
    > Watch App now stays in foreground for the entire session
    > New Heart Rate Chart and Strain Indicator added to the activity screen
    > Elapsed time live view appears automatically when the Watch app is in the background
    > New Effort Level screen to rate your session difficulty
    > Estimated sweat loss and heat load for Sauna & Steam sessions
    > Stop button moved off main activity screen, swipe to end or pause
    > Watch app now fully supports double tap gesture control on every screen. Perfect for when your watch screen is wet
    > New option to pause activities
    > Added more data to Dashboard Activity chart, along with comparisons to previous weeks
    > Improved heart rate tracking
    > Added red light therapy
    > Multiple screen redesigns
    > Export sessions to Strava
    > Added watch settings to iOS app too
    > New icon
    > Added option to enable water lock for non-water activities
    > Bug fixes
  2. v2.0.2iOS
    Our Biggest Update Yet!
    
    > New AI Coach with trend summaries and per-session insights
    > Watch App now stays in foreground for the entire session
    > New Heart Rate Chart and Strain Indicator added to the activity screen
    > Elapsed time live view appears automatically when the Watch app is in the background
    > New Effort Level screen to rate your session difficulty
    > Estimated sweat loss and heat load for Sauna & Steam sessions
    > Stop button moved off main activity screen, swipe to end or pause
    > Watch app now fully supports double tap gesture control on every screen. Perfect for when your watch screen is wet
    > New option to pause activities
    > Added more data to Dashboard Activity chart, along with comparisons to previous weeks
    > Improved heart rate tracking
    > Added red light therapy
    > Multiple screen redesigns
    > Export sessions to Strava
    > Added watch settings to iOS app too
    > New icon
    > Improved syncing
    > Bug fixes
  3. v2.0.1iOS
    Our Biggest Update Yet!
    
    > New AI Coach with trend summaries and per-session insights
    > Watch App now stays in foreground for the entire session
    > New Heart Rate Chart and Strain Indicator added to the activity screen
    > Elapsed time live view appears automatically when the Watch app is in the background
    > New Effort Level screen to rate your session difficulty
    > Estimated sweat loss and heat load for Sauna & Steam sessions
    > Stop button moved off main activity screen, swipe to end or pause
    > Watch app now fully supports double tap gesture control on every screen. Perfect for when your watch screen is wet
    > New option to pause activities
    > Added more data to Dashboard Activity chart, along with comparisons to previous weeks
    > Improved heart rate tracking
    > Added red light therapy
    > Multiple screen redesigns
    > Export sessions to Strava
    > Added watch settings to iOS app too
    > New icon
    > Improved syncing
    > Bug fixes
  4. v2.0.0iOS
    Our Biggest Update Yet!
    
    > New AI Coach with trend summaries and per-session insights
    > Watch App now stays in foreground for the entire session
    > New Heart Rate Chart and Strain Indicator added to the activity screen
    > Elapsed time live view appears automatically when the Watch app is in the background
    > New Effort Level screen to rate your session difficulty
    > Estimated sweat loss and heat load for Sauna & Steam sessions
    > Stop button moved off main activity screen, swipe to end or pause
    > Watch app now fully supports double tap gesture control on every screen. Perfect for when your watch screen is wet
    > New option to pause activities
    > Added more data to Dashboard Activity chart, along with comparisons to previous weeks
    > Improved heart rate tracking
    > Added red light therapy
    > Multiple screen redesigns
    > Export sessions to Strava
    > Added watch settings to iOS app too
    > New icon
    > Improved syncing
    > Bug fixes
  5. v1.0.24iOS
    - Added Strava integration. Post your sessions to Strava on demand, or automatically. Settings are in the WatchOS app.
    - Added kg to weight setup
  6. v1.0.23iOS
    - Added Year In Review. See your achievements and highlights from 2025
  7. v1.0.22iOS
    - Added ability to change weight from lbs to kg
    - Added water temperature to Apple Health
  8. v1.0.21iOS
    - The Watch Menu now orders activities by the last session type performed. The order can be changed in the settings to: Default, Last Used, Most Used
    - Updated for iOS 26
    - New Liquid Glass inspired icon
    - Fixed Widget problem with v1.0.20
  9. v1.0.20iOS
    - The Watch Menu now orders activities by the last session type performed. The order can be changed in the settings to: Default, Last Used, Most Used
    - Updated for iOS 26
    - New Liquid Glass inspired icon
  10. v1.0.19iOS
    - Added the ability to change the temperature during a session by tapping the temperature on the activity screen.
    - Improved how the default location of an activity is set based on past sessions.
    - Improved AI Chat to include more up-to-date and relevant questions & answers as well as links to videos explaining the answers.
  11. v1.0.18iOS
    - Added the ability to change the temperature during a session by tapping the temperature on the activity screen.
    - Improved how the default location of an activity is set based on past sessions.
    - Improved AI Chat to include more up-to-date and relevant questions & answers as well as links to videos explaining the answers.
  12. v1.0.17iOS
    - Added the ability to change the date of the chart view in the iOS app
    - Fixed glitch with the activity chart showing an extra 0 on the y-axis and the bar height not being correct in some cases
    - When using the Sauna sensor, the max temperature will now be saved, which will prevent an incorrect temperature reading if the user leaves the sauna before ending the session
  13. v1.0.16iOS
    - Added Cryotherapy activity type with temperature range down to -300F
    - Added ability to input a custom name when editing a saved session
    - Heart rate animation now pulses to the real heart rate
    - Increased timer range of Hyperbaric session
  14. v1.0.15iOS
    - Added Cryotherapy activity type with temperature range down to -300F
    - Added ability to input a custom name when editing a saved session
    - Heart rate animation now pulses to the real heart rate
    - Increased timer range of Hyperbaric session
  15. v1.0.14iOS
    - Added Cryotherapy activity type with temperature range down to -300F
    - Added ability to input a custom name when editing a saved session
    - Heart rate animation now pulses to the real heart rate
    - Increased timer range of Hyperbaric session
  16. v1.0.13iOS
    iOS App:
    - Added heart rate by day chart to Home Screen
    - Added heart rate by session chart to individual session detail screen
    - Added the ability to edit sessions
    
    Watch App:
    - Fixed issue causing calories burned to be stored improperly in Apple's Health App
  17. v10.0.12iOS
    - Added Hyperbaric Chamber activity with pressure tracking up to 2 ATM
  18. v10.0.11iOS
    - Fixes
  19. v10.0.10iOS
    - Fixes
  20. v1.0.9iOS
    - Added auto-saving sessions if you forget to end your session.
    - Fixed issue causing heart rate not to track for some users
  21. v1.0.8iOS
    - Added auto-saving sessions if you forget to end your session.
    - Fixed issue causing workout time in the fitness app to be incorrect if the app quits during a session
  22. v1.0.7iOS
    - NEW: Widgets! View your active timers and goals from complications and Smart Stacks.
    - Your custom places are now saved to use in future sessions.
    - Added temperature sensor calibration.
    - Improved activity rings. Shows progress past 100%
    - Fixes
  23. v1.0.6iOS
    - NEW: Widgets! View your active timers and goals from complications and Smart Stacks.
    - Your custom places are now saved to use in future sessions.
    - Added temperature sensor calibration.
    - Improved activity rings. Shows progress past 100%
  24. v1.0.5iOS
    - Added session logging for Apple's Fitness app
    - Added stable temperature indicator for the temperature sensor
    - Improved calorie tracking
    - Improved activity settings menu
    - Fixed notification delay
  25. v1.0.4iOS
    - Added session logging for Apple's Fitness app
    - Added stable temperature indicator for the temperature sensor
    - Improved calorie tracking
    - Improved activity settings menu
    - Fixed notification delay

Disclosure: Independent intel to help mobile builders succeed.

AI-powered analysis with editorial review, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by Ultra Cold Plunge & Sauna, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

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