Cold Plunge & Sauna: ColdSnap

The tracker for cold plunge, sauna, and red light therapy. Log sessions, run guided timers and breathwork, and build your streak. Made for the biohacker crowd.

Cold plunge. Sauna. Red light. Tracked.

ColdSnap is the session tracker for cold therapy, heat therapy, and red light therapy: the three recovery protocols people actually follow. Log every plunge, sauna sit, and light session. Run guided timers. Build streaks and see your weekly cadence.

HOW IT WORKS

1. Start a session: cold plunge, sauna, or red light
2. Log type, duration, temperature, and how you felt
3. Build daily streaks and watch your 7-day cadence chart fill in

SESSIONS TRACKED • Cold plunge: ice bath, cold tub, cold shower, lake or ocean immersion • Sauna: traditional Finnish, infrared, steam room • Red light therapy: full-body panels or targeted sessions

INTERVAL TIMER Guided timers for your protocols, including contrast sessions that walk you between cold and heat rounds. Finish a timed session and confirm it straight into your log.

BREATHWORK A guided breathing library built for cold exposure: box breathing, 4-7-8, and classic breath rounds with on-screen pacing. Prime your nervous system before the plunge or downshift after.

HEART RATE AND HRV Connect Apple Health (optional) and see heart rate and HRV alongside your sessions, so you can watch how your body actually responds to cold, heat, and light over time.

LOG EVERY SESSION • Pick the session type: plunge, sauna, or red light • Set duration in minutes and seconds • Optional water or air temperature • Optional 1-5 mood and energy ratings • Optional notes: how it felt, where you were, anything worth remembering

STREAK ENGINE Daily streak counter and a 7-day cadence chart on Home. See the days you skipped. Get back on track.

SESSION HISTORY Every logged session, reverse-chronological. Filter by type, search by notes, and tap any session for the full detail view.

PRIVATE BY DEFAULT ColdSnap stores everything locally on your device: no account required, no cloud login. Your sessions are yours.

SAFETY FIRST Cold immersion can cause cardiovascular stress. ColdSnap includes a safety acknowledgement during onboarding and a cold-temp reminder if you log a plunge below 50°F. Don't plunge alone, especially when starting out.

BUILT FOR • Cold-therapy practitioners with a home plunge or chest freezer • Sauna owners, from barrel builds to infrared • Red light therapy users • Athletes tracking recovery between training blocks • Biohackers stacking cold, heat, and light

ColdSnap requires a subscription or purchase to use premium features, plans detailed below:

PREMIUM PLANS ($2.99/week, $7.99/month, $39.99/year with 3-day free trial, $24.99/year discount, $59.99/lifetime): • More session logs across all three modalities • Guided breathwork library • Heart rate and HRV insights from Apple Health • Streaks and the 7-day cadence chart • Full session history with filters

By downloading this app, you agree to our terms and conditions and privacy policy: Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy: https://www.format.partners/coldsnap-privacy-policy Support: https://www.format.partners/support Contact: hello@format.partners

ColdSnap is a session tracker for cold exposure, heat therapy, and red light therapy. It is not medical advice. Cold plunging carries real cardiovascular risk: do not plunge alone, and do not plunge with untreated heart disease, arrhythmia, or uncontrolled high blood pressure, or while pregnant. Start short and build up over weeks. Consult your doctor before starting any new recovery or contrast protocol. Red light devices vary widely in quality and output, so follow your manufacturer's guidelines.