Heated classes aren't all the same—heat changes effort.
Log studio temperature to capture true intensity.
See the impact of heat on your heart rate. Track on Apple Watch, review on iPhone.
Heated classes aren't all the same—heat changes effort.
Log studio temperature to capture true intensity.
Standard fitness apps miss the heat factor.
See how heat changes your heart rate—session to session.
No way to know if you're acclimating.
Track adaptation over time with heat-aware trends.
Heart rate, duration, calories, and temperature—all in one view.
Track heart rate trends across weeks and months.
Understand effort at different heat levels.
Tag sessions as Vinyasa, Power, Yin, or your own custom types.
Use your existing workouts. Your data stays on your devices.
AI-written summaries of your sessions and adaptation over time.*
*AI insights require supported devices.
HeatLab requires an iPhone with iOS 17+ and an Apple Watch (Series 4+) with watchOS 10+. AI insights require a device that supports Apple Intelligence (iPhone 15 Pro or newer).
HeatLab is free with 7-day session history. Pro ($4.99/month or $39.99/year) unlocks unlimited history, trends, and AI insights.
Yes. HeatLab can use eligible workouts from Apple Health. Add temperature and tags to any past workout.
All data stays on your devices and syncs via your private iCloud. We never see your health data. See our Privacy Policy.
Yes. Export from app settings anytime. To delete, remove the app—iCloud data is removed automatically. Or contact us.
Free to download. Pro from $4.99/month. No account required.