Water Temperature: Cold Plunge
Measured live by your watch
$4.99 · Designed for iPhone. Not verified for macOS.
Your Apple Watch knows the water temperature. This app turns it into something more: a logbook for your favorite lake, the ocean on vacation, and every swim in between. With temperature curves, weather, and place. With your whole season on your iPhone. And with milestones for the cold plunge crowd.
YOUR WATER LOGBOOK
• Every dive is saved automatically, with temperature curve, duration, and depth
• Weather and swim spot can be saved right along with it
• Stats with temperature trends, records, and your swimming spots
• Everything lands on your iPhone and in your private iCloud, automatically
MOMENTS WORTH KEEPING
• The app celebrates with you: a new cold record, a new body of water, your fiftieth dive
• From "Ice bath" to "Bathtub": it tells you how the water feels
• Share your reading as a beautiful graphic, square or story format
ALWAYS IN VIEW
• A complication for your watch face, widgets for your Home and Lock Screens
• Your last reading at a glance, without opening the app
MEASURING, WITHOUT LIFTING A FINGER
• Measuring starts on its own the moment you dive in
• A big live display, down to a tenth of a degree, sensor accuracy included
• Coming up for air? The measurement waits for you and simply keeps going
• The display feels it too: icy blue in winter, warm turquoise in a summer lake
WELL CONNECTED
• Saves your dives to Apple Health if you like, and imports your swim workouts
• CSV export for anyone who wants every last detail
PRIVATE, THE WAY IT SHOULD BE
No account, no ads, no tracking. Your data stays on your devices and in your private iCloud.
And if you look closely while measuring, you might spot a little visitor in the water.
Live measuring uses the water temperature sensor of the Apple Watch Ultra, Series 10, and Series 11. No sensor Watch? The iPhone app can import the water temperatures from your swim workouts in Apple Health.
Weather data from Apple Weather.
New: The app now runs on iOS 18 and watchOS 11, so it's available on many more iPhones and Apple Watches.
Also:
• Weather and place are filled in even more reliably: whatever your Apple Watch couldn't fetch when you surfaced, your iPhone adds later
• Smaller fixes and improvements
The developer, Joe Waldow, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Health & Fitness
- Location
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Joe Waldow
- Size
- 11.7 MB
- Category
- Weather
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later. - Apple Watch
Requires watchOS 11.0 or later.
- iPhone
- Languages
English and 19 more
- English, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Italian, Japanese, Korean, Norwegian Bokmål, Polish, Portuguese, Russian, Spanish, Swedish, Turkish, Ukrainian
- Age Rating
4+
- 4+
- Copyright
- © 2026 Joe Waldow
