Sauna Cycle: Heat Cold Rest

Master the art of thermal contrast. Guided sauna & cold plunge sessions, a score that tracks your adaptation, and haptic cues so you never watch the clock.

Sauna Cycle is the companion for people who take heat and cold seriously. Guided sauna, cold plunge, and rest cycles — timed, scored, and tracked — wrapped in a calm, dark interface designed for the ritual, not the screen.

THE SESSION PLAYER Guided phases: heat, cold, rest — fully customizable cycles

Haptic transitions tell you when to move, so you never watch a clock

A depleting phase ring shows exactly where you are at a glance

Pause, skip, or end early — your session, your rules

THERMAL ADAPTATION SCORE Every session earns a score from 0 to 100, built from your heat exposure, cold exposure, and consistency. Watch your tolerance grow week after week — proof that your body is adapting.

TRACK YOUR PRACTICE Session history with time in heat, cold, and rest

Streaks and trends that reward consistency

Charts that make progress obvious

HEALTH INTEGRATION (OPTIONAL) Connect Apple Health to enrich sessions with heart rate and HRV, and see how your body responds to thermal contrast. Everything stays on your device.

DISCOVER RITUALS Curated protocols for saunas, ice baths, cold showers, and contrast therapy — from gentle first plunges to advanced routines. Each venue idea comes with a ready-to-run session.

PRIVATE BY DESIGN No account. No ads. No cloud. Your data lives on your iPhone, period.

WHO IT'S FOR Sauna lovers, cold plunge regulars, athletes chasing recovery, and anyone building a deliberate hot-cold practice for resilience and longevity.

Sauna Cycle is an educational tool, not medical advice. Thermal contrast is intense — consult a professional before starting, and always listen to your body.