https://hormetic.app/ 2026-09-28 https://hormetic.app/img/c01-hero-corridor-v5.webp Two people walking through a dim spa corridor, towels over their shoulders, Apple Watch on each wrist https://hormetic.app/img/c01-heat-mara-adapt-v5.webp After a sauna session: checking Apple Watch in the locker room https://hormetic.app/img/c01-cold-pov-plunge-v2.webp First-person view from a cold plunge: Apple Watch showing 01:14, Zone 2, water 51°F measured https://hormetic.app/img/c01-spa-mara-v5.webp In a steaming hot tub, a woman rests her arm on the stone rim, an Apple Watch on her wrist https://hormetic.app/img/c01-cta-duo-b6e.webp Two people in a spa corridor; one checks the Apple Watch on his wrist https://hormetic.app/img/shot-v7-01-adapt.webp Hormetic iPhone screenshot: the Adapt tab's This week view with a dry-sauna visits ring and Estimated minutes by day https://hormetic.app/img/shot-v7-04-spa-entered.webp Hormetic iPhone screenshot: a hot tub session with its own Estimated soak dose and an entered water temperature https://hormetic.app/img/watch-10-start-v7.webp Hormetic Apple Watch screenshot: the start screen with Heat, Cold and Spa https://hormetic.app/privacy 2026-09-27 https://hormetic.app/support 2026-09-07 https://hormetic.app/sauna 2026-09-28 https://hormetic.app/cold-plunge 2026-09-28 https://hormetic.app/hot-tub 2026-09-28 https://hormetic.app/journal/ 2026-09-28 https://hormetic.app/journal/does-apple-watch-measure-water-temperature 2026-09-28 https://hormetic.app/img/journal/does-apple-watch-measure-water-temperature-hero.webp First-person view from a cold plunge: an Apple Watch on the raised wrist showing a live cold session with the water temperature