# CryoZest - Self Experiment — Stop guessing, start testing > Log and analyze hot and cold therapy sessions, integrating with Health app data. (iPhone/iPad app by OKRA Labs LLC.) - Source: https://appshunter.io/ios/app/cryozest-self-experiment/id6449912558 (this page in markdown: same URL + `.md`) - Developer: [OKRA Labs LLC](https://appshunter.io/developer/1691008963) - Category: Health & Fitness, Lifestyle - Price: Free - Rating: 4.30/5 from 20 App Store ratings · 9 written reviews indexed - Age rating: 4+ - Requires: iOS 16.2 · 4 MB - Languages: American English - Released: 2023-06-07 - Data updated: 2026-06-10 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/cryozest-self-experiment/id6449912558/reviews.md ## What is CryoZest? CryoZest is your ultimate companion for tracking hot and cold therapies. Now, with the integration of Health app using HealthKit and CareKit APIs, you can seamlessly manage your wellness routine in one place. Whether it's sauna sessions, hot yoga, cold showers, or cold plunges, CryoZest offers an intuitive and streamlined way to keep track of your routines. You can log your sessions and, with our integration with the Health app, connect them to a broader spectrum of your health data. By doing so, you can uncover patterns, monitor progress, and make data-driven decisions about your wellness journey. With CryoZest, you can: - Record details about each session, including duration, temperature, and perceived intensity. - View your session history at a glance, with easy-to-read visuals and summaries. - Analyze your trends over time to see how your habits are improving your wellbeing. - Monitor associated health metrics to understand the full impact of your hot and cold therapies, with the added benefit of synchronization with your Health app data. Embrace a new level of insight into your hot and cold therapies with CryoZest. Download now to enhance your wellness routine, with the added advantage of integration with your Health app! ## Key features - Log hot and cold therapy sessions - Track duration, temperature, and intensity - View session history and trends - Integrate with Health app via HealthKit/CareKit - Monitor associated health metrics - Data-driven wellness insights ## Recent user reviews (9 of 9) All indexed reviews: https://appshunter.io/ios/app/cryozest-self-experiment/id6449912558/reviews.md ### 5/5 — Insights are unique *2026-03-12* It’s cool to see the correlations it finds. It says my resting heart rate has been decreasing from the swimming I’ve been doing ### 2/5 — No Sauna or cold plunge timer *2026-01-06* The app use to have a cold plunge tracker as well as a sauna tracker but they have gotten rid of it. It used to be the core function of the app ### 5/5 — Nice app *2024-02-17* I use it all the time to track my runs ### 2/5 — Decent app. Has problems. *2024-02-06* Tracks and records info that other apps don’t. Problems I’ve had with it: When recording a session, my phone goes to sleep. Screen won’t stay on when recording a session. Sometimes when I record a session it records the value as 0 minutes 0 sec completed. There is no way to edit or delete a session so the days where it gives me a zero value it messes up my tracked info and skews my averages. **Developer response:** Hello, Wanted to thank you for bringing this issue to light. We have updated Cryozest and it now includes the ability to delete an existing therapy session. Give it a download and let us know what you think! With regards to the phone going to sleep, I suggest going through your phone settings and changing the frequency and speed that your phone goes to sleep. ### 1/5 — Built for the US, only Fahrenheit temps *2024-01-17* Essentially built for the US not the majority of countries which use a metric system. No option to change the temp to Celcius ### 5/5 — Unbelievable *2024-01-13* This app has completely revolutionized my life. You need to stay on top of logging your behaviors to get good data but when you do the output is incredible ### 4/5 — Very cool, would love if had Apple Watch app and logged entries into Apple Fitness/Health *2023-11-16* Hello, This is a very rare app to find that allows me to track sauna and cold showers. I just started to use it and enjoyed using it. I do wish that it had an Apple Watch app so I could leave my phone in my locker away from the sauna, and that it could have the option to log session entries into Apple Fitness/Health. Also, I know Garmin watches let you grab temperature. Not sure if Apple Watch lets you, but that would be cool if the app could grab the sauna temperature from the watch. I would definitely pay for this app to have those features in a paid Pro version. ### 2/5 — Apple Watch *2023-09-09* I like it but I wish it worked on the Apple Watch ultra. ### 5/5 — CryoZest *2023-06-07* This is just the application I need to keep track of my hot saunas and cold plunges, amazing app 🎊🎉🥳 ## Frequently asked questions about CryoZest ### What types of therapies can I track with CryoZest? CryoZest allows you to log various hot and cold therapies, including sauna sessions, hot yoga, cold showers, and cold plunges. You can record details such as duration, temperature, and perceived intensity for each session. ### How does CryoZest integrate with the Health app? CryoZest utilizes HealthKit and CareKit APIs to seamlessly integrate with your iPhone's Health app. This allows you to connect your therapy session data with your broader health metrics for a more comprehensive view of your wellbeing. ### Can I see my progress over time with CryoZest? Yes, CryoZest provides easy-to-read visuals and summaries of your session history. You can analyze your trends over time to monitor improvements in your wellbeing and understand the impact of your hot and cold therapies. ### What devices does CryoZest support? CryoZest is available for iPhone and iPad. It is designed to run on Apple devices, leveraging their integrated health tracking capabilities. ### Is CryoZest free to use? Yes, CryoZest is available for free. There are no in-app purchases or subscription fees required to use its core features for tracking and analyzing your therapy sessions. ### How often is CryoZest updated? The latest version of CryoZest is 3.2.0, which was last updated on March 10, 2026. While this indicates a recent update, the app's update frequency can vary based on developer plans and user feedback. ### What is the age rating for CryoZest? CryoZest has an age rating of 4+. This indicates that the app is suitable for users of all ages, with no content restrictions for younger audiences. ### Does CryoZest have ads? No, CryoZest does not contain advertisements. The app is designed to provide a clean and uninterrupted experience for users tracking their health and wellness routines. ## Version history (last 5 releases) ### 3.2.0 — 2026-03-10 Improved AI integration ### 3.1.2 — 2026-03-05 AI coach. Improved correlations ### 3.1.1 — 2026-03-03 - AI assistant - Updated insights ### 3.1.0 — 2025-11-26 • New health analysis features • Updated UI • Updated onboarding ### 3.0.3 — 2025-11-13 - Improved UI - Bug fixes - Mood insights ## Apps similar to CryoZest | App | Rating | Price | Category | | --- | --- | --- | --- | | [ThermaSesh](https://appshunter.io/ios/app/thermasesh/id6447648037) | 4.6 (69) | Free | Health & Fitness | | [Ultra Cold Plunge & Sauna](https://appshunter.io/ios/app/ultra-cold-plunge-and-sauna/id6499478156) | 4.2 (42) | Free | Health & Fitness | | [GoPolar: Cold Plunge & Sauna](https://appshunter.io/ios/app/gopolar-cold-plunge-and-sauna/id6463441179) | 4.7 (275) | Free | Health & Fitness | | [Chill - Cold Plunge Timer](https://appshunter.io/ios/app/chill-cold-plunge-timer/id6449394827) | 5.0 (2) | Free | Health & Fitness | | [Cold Water Therapy](https://appshunter.io/ios/app/cold-water-therapy/id1562132065) | 2.8 (43) | Free | Health & Fitness | | [Ice Barrel](https://appshunter.io/ios/app/ice-barrel/id6448100865) | 3.9 (29) | Free | Health & Fitness | ## More apps by OKRA Labs LLC - [Zone2Track](https://appshunter.io/ios/app/zone2track/id6451061206) - [Pocket Factz](https://appshunter.io/ios/app/pocket-factz/id6451423765) - [uBreathe - Breathing Exercises](https://appshunter.io/ios/app/ubreathe-breathing-exercises/id6468918653) - [BeastMode - Daily Motivation](https://appshunter.io/ios/app/beastmode-daily-motivation/id6468924163) - [Dare Daddy](https://appshunter.io/ios/app/dare-daddy/id6742521615) All apps by OKRA Labs LLC: https://appshunter.io/developer/1691008963 ## Related topics [okra labs llc](https://appshunter.io/ios/topics/okra-labs-llc) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*