This app tracks your body's response to heat exposure using heart rate and manually entered temperature. It provides detailed session data, a heat-dose score, and a history of your thermal-dose sessions. Your data remains private on your device.
1.7.0
September 28, 2026
Hormetic 1.7 — a cleaner look, and less tapping. • Favorites and routines: save a setup once and start it from your Watch with one tap and a 3-second countdown you can cancel. Build a routine on iPhone or Watch and move through it with Next. • A new Watch start screen: Heat, Cold and Spa up front, with favorites and routines one swipe away. • Adapt, redesigned: your week at a glance, with big tiles, trends and a dry-sauna visits ring. Its default of 4 comes from the Finnish KIHD study's "4–7 times a week" group, as a reference, not a recommendation. • Compare two sessions of the same type side by side. • Log filters for today, this week, session type and dates. • Home Screen and Lock Screen widgets with your week's rings and bars, off until you turn them on. • Apple Fitness now lists new sessions by what they were, such as Dry Sauna, Cold Plunge or Hot Tub, instead of "Other". • An optional live view on iPhone of the session running on your Watch. Every estimate is still labeled "Estimated", and your data still stays on your device.
MoreHormetic is a health and fitness app that tracks your body's response to heat exposure. It uses your heart rate and a temperature you manually enter to estimate a heat-dose score and provide detailed session insights.
Hormetic uses your heart rate, the temperature you manually input, and the session duration to calculate an estimated heat-dose score. It also records your heart rate as a HealthKit workout.
Yes, Hormetic is designed for privacy. Your data never leaves your device, and there is no account, analytics, or telemetry. It does not sell personal information.
Hormetic requires an iPhone running iOS 18 or later. An Apple Watch is optional and is used for heart rate tracking.
Hormetic is a paid app, available for $1.99. It does not have in-app purchases or advertisements.
No, Hormetic is ad-free. As a paid application, it does not contain any advertisements.
The latest version of Hormetic is 1.4, last updated on June 28, 2026. The app's algorithm is versioned independently from the app itself for transparency.
Hormetic has an age rating of 17+. This is likely due to the nature of health tracking and the recommendation to consult a healthcare professional before starting new activities.
