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  1. v1.6.5iOS
    1. Custom themes can now be used locally without spending Heart Coins
    2. Fixed an issue where saving target adjustments for daily health check-ins was unclear
    3. Optimized some logic and copy
  2. v1.6.4iOS
    1. Added Flights Climbed data: Daily health check-in, Insights page, and watch widgets now supported (launched together)
    2. During Breathing Relaxation and Kegel Relaxation training, background music and voice guidance can now play while the screen is locked
    3. Improved some UI control logic for relaxation training
    4. Fixed an issue where the monthly and yearly heatmaps did not follow the custom week start (Sunday/Monday) for each month
    5. Fixed an issue where data such as Water Intake and Blood Oxygen could not display properly on the Insights page
  3. v1.6.3iOS
    1. Added background music and voice cues to Breathing/Kegel training
    2. Improved some onboarding copy
    3. Improved the display of some watch faces
    4. Fixed an issue where the top countdown text was incorrect after starting Kegel training
  4. v1.6.2iOS
    1. Optimize the content of the first-time onboarding page
    2. Optimize the content of the custom theme sharing page
  5. v1.6.1iOS
    Add member badge
    Add a re-check button for legacy users
  6. v1.6.0iOS
    1. Reduced Heart Coin cost when creating and redeeming custom themes
    2. Increased Heart Coin earning speed for members
    3. Added membership system
  7. v1.5.6iOS
    1. Improved custom theme resolution; it now looks sharper on Apple Watch
    2. Added a linked discount with MoMoSleep
    3. Fixed some UI issues
    4. Optimized some logic
  8. v1.5.5iOS
    1. The basic sleep data is now displayed directly on the Insights page
    2. The circular watch-face widget now supports custom themes
    3. The circular watch-face theme now supports real-time stress data
    4. Fixed some logic issues
  9. v1.5.4iOS
    Fixed stutter at launch and an issue where the device could freeze on certain systems.
  10. v1.5.3iOS
    Fixed a crash that could cause the app to quit unexpectedly on iOS 16.
  11. v1.5.2iOS
    Urgently fixed an issue where Traditional Chinese, Japanese, and Korean text could appear garbled in the app’s New Features section.
  12. v1.5.1iOS
    Urgently fixed the garbled-text issue during custom theme uploads and the issue where the real-time stress watch face could not display custom themes.
  13. v1.5.0iOS
    1. Custom Themes are now live—create your own watch face theme!
    2. Real-time Stress enhanced: stress during physical activity is now supported.
    3. Data backup is now available.
    4. Fixed several crash issues.
  14. v1.4.1iOS
    1. Optimized the scrolling behavior of the top bar on the Insights page
    2. Improved the sleep information display on Insights; it now shows data from the last 7 days
    3. Sleep analysis details on Insights now deep-link directly to MoMoSleep (when installed)
    4. The Water and Caffeine cards on Insights are now tappable; tapping opens today’s Water page to easily review history and add data
  15. v1.4.0iOS
    1. A brand-new Insights page where you can easily review daily health indicators, health check-ins, and your sleep status.
    2. A brand-new Relax page to actively relieve stress, offering breathing exercises, water-intake logging, and Kegel training.
    3. Optimized presentation of the stress scale; it is now easier to read.
    4. Refined parts of the UI logic and fixed crash issues.
  16. v1.3.6iOS
    1. Added an option to play the home stress‑relief animation randomly; you can enable it in Settings
    2. Fixed issues and optimized logic
  17. v1.3.5iOS
    Optimize iOS widget refresh rate and UI performance
  18. v1.3.4iOS
    Further optimize the widget’s refresh logic and support behavior when there is no data
  19. v1.3.3iOS
    Optimize iOS widget refresh rate and UI performance
  20. v1.3.2iOS
    Urgent fix for widget-related issues
  21. v1.3.1iOS
    Urgent fix for widget-related issues
  22. v1.3.0iOS
    New:
    1.Added yearly & monthly stress heatmaps to the History page
    2.iOS widget: Stress Barometer
    3.iOS widget: Daily De-stress Check-in
    4.iOS widget: Latest HRV Stress
    5.iOS widget: Stress Pass
    6.Added new watch-face templates
    Fixes & Optimizations:
    1.Fixed daily check-ins not auto-completing if the app wasn’t opened
    2.Fixed update issues on the Roast-Duck watch face
  23. v1.2.8iOS
    Added:
    1.Added a changelog page
    2.Added solutions for some common FAQs
    Fixes & Optimizations:
    1.Fixed the issue where the Sunscreen watch face did not automatically update data
    2.Fixed the issue where the vitality value in the Stress & Vitality watch face updated slowly
    3.Optimized the behavior of the Emotion Bomb watch face component when data is sparse
  24. v1.2.7iOS
    Fix an issue where the Energy watch face sometimes fails to display numbers correctly
  25. v1.2.6iOS
    1.Add Stress & Energy watch face to view stress and energy simultaneously
    2.Add Mood Bomb watch face
    3.Add 5 new redeemable stress‑relief themes
    4.On mobile, tap the real‑time stress chart for details
    5.Optimize the energy calculation method for greater accuracy

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 StressBook: Watch HRV Tracker, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

Data licensed under CC-BY-NC 4.0