SnowFire: Cold Plunge & Sauna

SnowFire is the thermal therapy tracker for people who take cold plunge, sauna, and steam seriously. Real protocols. Real benefit data. Real-time tracking from your Apple Watch.

SCIENCE-BACKED PROTOCOLS Follow weekly programs from Søberg, Huberman, Patrick, Nordic, and more. Each protocol comes with weekly time, temperature, and session targets pulled from peer-reviewed research. Run guided protocol sessions where every step has timed instructions — follow Søberg's cold-hot-cold sequence or any framework, step by step.

APPLE WATCH INTEGRATION Start sessions from your wrist. Live heart rate, calories, stage progress, and water temperature through the entire session. Cold plunge water temperature auto-detects on Apple Watch Ultra and Series 9 or later. Leave the phone in the locker.

REAL-TIME BENEFIT STAGES Watch your sessions progress through scientifically mapped stages — Cold Shock Response, Catecholamine Activation, Peak Neurochemical Response. Know exactly when you've hit each zone in real time.

BENEFITS TRACKING Track 28 estimated benefits across sessions including norepinephrine, dopamine, brown fat activation, cardiovascular health, BDNF, and heat shock proteins. Every benefit tagged with the evidence strength behind it.

HEALTH METRICS Full heart rate curves, HRV, HR range, average bpm, and calories burned — captured automatically through Apple Watch and synced to Apple Health.

CUSTOM ROUTINES Build multi-step routines that match how you train. Stack cold, sauna, cooldown, and steam steps with custom durations and temperatures. Save them. Launch with one tap.

BREATHWORK INTEGRATION Four guided techniques: Box, Wim Hof, Physiological Sigh, and Cold Plunge Prep. Use them standalone or as pre-session prep before cold or sauna.

WEEKLY GOAL TRACKING Visual goal rings for cold, sauna, and steam show weekly progress at a glance. Track streaks, total time, session counts, and trends by week, month, or year.

SESSION HISTORY Color-coded activity calendar shows every session. Filter by type, browse daily breakdowns with duration, temperature, and heart rate.

APPLE HEALTH NATIVE Every session writes a workout to the Health app with full HR samples, calories, and duration. Thermal therapy data sits next to your lifts and runs.

WIDGETS & LIVE ACTIVITIES Follow active sessions from your Lock Screen. Add Home Screen widgets to check weekly goal progress without opening the app. Launch sessions instantly with Siri Shortcuts.

14-day free trial. iOS + Apple Watch. Built for daily use.

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