Plunge Tracker

About Plunge Tracker

Plunge Tracker is an offline timer and logbook for cold-water immersion sessions. Users set a target duration, start the countdown, and receive an audible cue when they reach the target. The session is then recorded with its duration and water temperature. The target can be adjusted in 15-second increments, and an optional ten-second count-in gives the user time to enter the water before the timed interval begins. The app can play optional ambient soundscapes during a session and keep the screen on so the countdown remains visible. It includes a history of sessions and can export the full log to CSV. Temperature can be displayed in Celsius or Fahrenheit, and the interface supports light, dark, or system appearance. Plunge Tracker works entirely on the device, with no account, network connection, analytics, advertising, or permissions. It includes cold-plunge safety guidance. The app is a timer and notebook, not a device for supervising a session or providing medical advice. Its simple record of time and temperature helps users review past sessions while keeping the data local.

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