Ice Bath, Cold Plunge & Sauna

The cold plunge and sauna tracker for people who actually get in the water.

Kelvy times your ice bath, guides your sauna and cold plunge rounds, and keeps a clean log of every session: how long, how cold, how hot, and how it felt. No kitchen timer, no notes app.

ICE BATH & COLD PLUNGE TIMER • Count down to a target or run an open timer • Big, glanceable numbers you can read from the tub • Spoken cues so you never have to look at the screen (Pro) • Ice barrel, cold plunge, cold shower, open water

SAUNA TRACKER • Traditional sauna, infrared, steam room, hot tub, red light • Log air or water temperature in °F or °C • Switch units any time and your history stays correct

CONTRAST THERAPY, STEP BY STEP • Guided routines: sauna, rest, plunge, repeat • Free routines to start: First plunge, Finnish sauna, Nordic cycle • Full routine library and your own custom routines (Pro)

FREE APPLE WATCH APP • Start a session from your wrist, leave your phone in the locker • Pick a target, see the timer, log temperature and mood

STREAKS & WEEKLY GOALS • Weekly cold and heat goals, in sessions and minutes • Streak tracking with rest days that don't break it • Your full session history, always free

INSIGHTS (PRO) • 14-week activity heatmap • Averages, personal records and heart rate trends • CSV export of every session

Kelvy also saves your sessions to Apple Health.

KELVY PRO Kelvy Pro is available as a weekly subscription with a free trial for eligible new subscribers, or as a yearly subscription. Payment is charged to your Apple ID account. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel in your App Store account settings.

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