PlungeLab: Cold Plunge Tracker

PlungeLab turns every cold session into a clear picture of your routine and recovery—not just another streak. Start a session from Apple Watch, or log it manually on iPhone. PlungeLab records duration, temperature, and heart rate, then uses your Apple Health data to help you explore how plunge days align with sleep, HRV, and resting heart rate. TRACK EVERY SESSION • One-tap Apple Watch capture with live heart rate and elapsed time • Automatic water-entry detection and water temperature on supported Apple Watch Ultra models • Two-minute post-session heart-rate recovery measurement • Manual logging for cold plunges, cold showers, open water, sauna, and contrast sessions • Complete history with editing, notes, mood, and perceived intensity FIND YOUR RHYTHM • Weekly cold-minute target and progress ring • Vacation-friendly weekly streaks • Reminders that update when you record a session • Home Screen and Lock Screen widgets, plus Apple Watch complications UNDERSTAND YOUR PATTERNS WITH PRO • Compare HRV, resting heart rate, sleep, and mood on plunge days and rest days • Explore adaptation trends across similar temperatures and durations • Review dose guidance based on your own history • Export your sessions as CSV PRIVATE BY DESIGN No account is required. Session history and Apple Health analysis stay on your devices. RevenueCat processes limited purchase, entitlement, and technical information, but never receives your health or session data. SAFETY FIRST Built-in guidance covers cold shock, afterdrop, and gradual progression. PlungeLab is not a medical device and does not provide medical advice. WORKS WITH Apple Watch Series 6 or later, Apple Watch SE (2nd generation) or later, Apple Watch Ultra, iPhone, and Apple Health. Apple Watch Ultra adds automatic detection and water-temperature capture when available. PlungeLab Pro is available as a monthly or yearly auto-renewing subscription or a one-time lifetime purchase. The yearly subscription includes a 7-day free trial for eligible customers. Payment is charged to your Apple Account when you confirm your purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel subscriptions in your App Store account settings. Terms: https://plungelab.app/terms/ Privacy: https://plungelab.app/privacy/