Early access

The PlungeLog app is on its way, Android first

A session timer and log for people who already have a tub, a barrel, a chest freezer or a gym sauna. Time it, log it, watch the week fill up. Android first, then iPhone.

What it will do

• Time cold and heat. Pick cold plunge or sauna, enter the water or air temperature, and start. Rounds and a breath timer are built in, and the screen stays readable with wet hands.
• Log every session. Minutes, temperature, rounds and how you felt are saved the moment you stop. Edit later, add a note, or log a gym session you timed on the wall clock.
• A weekly heat and cold target. Built on published protocols (the 11 minutes of cold and 57 minutes of sauna a week from the 2021 Soberg study group, labeled as a reference, not a prescription), shown as two rings that fill through the week.
• Streaks that forgive a rest day. Weekly minutes are the unit, so one missed day does not reset you to zero.
• Health Connect and Apple Health. Optional sync of sessions to Health Connect on Android and Apple Health on iPhone.

What it will not do

It will not control your chiller, your heater or anything else. It will not tell you a routine is safe for you, promise an outcome, or push you to colder water or longer times. The safety rules sit in the app the same way they sit on this site.

Why Android first

Most of the people who wrote to us about logging sessions are on Android, and shipping one platform well is better than shipping two half-finished ones. The iPhone version follows. Early-access members get both launch emails.

Try the free tools today

You do not have to wait for the app. The cold plunge time calculator turns your water temperature into minutes, and the contrast therapy builder lays out a printable week.