Heat-exposure sessions logged as HealthKit workouts. Estimated heat-dose zones with honest math. Every value labeled Estimated. No accounts. No analytics. Your data never leaves your device.
Logs each session as a HealthKit workout. Estimates your heat-dose zone from your heart rate, the temperature you enter, and session duration. Shows your time in each zone, peak response, and the version of the algorithm that produced your score.
Hormetic does not require you to place your Apple Watch or iPhone in a sauna or any hot environment. The temperature is a value you enter yourself. Keep your devices within their published operating temperature ranges (0–35°C / 32–95°F). You are responsible for keeping your devices safe.
Most wellness apps wrap marketing language around vague metrics. Hormetic does the opposite. Every value the algorithm derives is labeled "Estimated" in the interface — you always know what was measured versus inferred. The math is documented and citable. Sessions record which version of the algorithm produced their values, and your history is never silently recomputed when the algorithm changes.
No account. No signup. No server. No analytics. No third-party SDKs. No tracking identifiers. No ads. Your data lives on your device and nowhere else. This is not a marketing claim — there is no infrastructure to send your data to, by design. Read the full policy →
Hormetic V1.0 is in TestFlight. App Store submission is in progress. For questions, beta access requests, or feedback: support →