LiveHeat
Real-time core temp on Watch.
$9.99 · Designed for iPhone. Not verified for macOS.
See your real-time body temperature on your Watch. LiveHeat connects directly to your CORE sensor (required) no phone needed during your workout.
The only Watch app that shows your CORE body temperature in real time, no iPhone needed.
STANDALONE ON YOUR WRIST
Most sports sensors need your phone nearby to display data. LiveHeat connects directly to your CORE sensor over Bluetooth and streams live readings to your Apple Watch, every second, hands-free, whether your phone is in your bag or at home.
4 TEMPERATURE ZONES AT A GLANCE
Color-coded zones show exactly where your body is:
- Baseline: normal resting temperature
- Elevated: body beginning to heat
- Heat Training: optimal training window
- Danger: take action now
A live position needle shows where you are within each zone, not just which zone you're in.
HEART RATE + TEMP TOGETHER
Pair a Bluetooth HR strap (Polar H10, Garmin, and others) simultaneously. See your core temp and heart rate side by side with independent zone indicators on a single screen.
ZONE TIME TRACKING
Track how long you've spent in each temperature zone during your session. Daily totals reset at midnight. Ideal for heat acclimatization protocols and training load monitoring.
FULLY CUSTOMIZABLE
Adjust temperature zone boundaries to match your physiology
Set custom heart rate zone thresholds
Toggle between °C and °F
All settings sync instantly, no app restart needed
WHO IT'S FOR
Built for endurance athletes, cyclists, triathletes, and anyone using heat training or heat acclimatization protocols. If you wear a CORE sensor, this app turns your Watch into a dedicated real-time display, the one you've been waiting for.
COMPATIBILITY
Requires Apple Watch and a CORE body temperature sensor (by greenTEG). Compatible with any Bluetooth Low Energy heart rate monitor.
Apple Watch is a trademark of Apple Inc. CORE is a trademark of greenTEG AG. This app is not affiliated with or endorsed by greenTEG AG.
No changes. Updated marketing images and app description.
The developer, Nils Albertsen, 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 Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Nils Albertsen
- Size
- 2 MB
- Category
- Utilities
- Compatibility
Requires iOS 14.0 or later.
- iPhone
Requires iOS 14.0 or later. - iPod touch
Requires iOS 14.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later. - Apple Watch
Requires watchOS 26.4 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Nils Albertsen
