ColdLog
Track cold plunge sessions on Apple Watch
FreemiumiOS
 - 2025-12-01 at 11.13.52.avif)
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About
ColdLog is an iOS and Apple Watch app for tracking cold plunge and ice bath sessions. It helps users record key details such as how long they stayed in cold water, the water temperature captured with Apple Watch sensors, and heart rate during exposure through HealthKit. The app keeps a session history with statistics and trends, and it automatically syncs data between iPhone and Apple Watch. Additional tools include Water Lock activation, custom timer alarms, and support for starting sessions quickly on Apple Watch Ultra with the Action Button. ColdLog can also record GPS location, capture weather data like air temperature and humidity, and generate shareable session cards for social media.
Problem & solution
Problem
Hard to track cold plunge sessions and body response consistently.
Solution
iOS/watchOS app logs duration, temp, heart rate, and stats.
Who it's for
Cold plunge and ice bath practitioners using iPhone/Apple Watch.
Main features
- Duration tracking
- Water temperature logging
- Heart rate via HealthKit
- Insights and stats charts
- iPhone–Watch auto sync
Use cases
- Log a cold plunge with sensors
- Review trends and share sessions
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