CORE Thermal Sensor
greenteg AG Health & Fitness iPhoneiPadiPod touch
CORE Thermal Sensor is a free Health & Fitness app for iPhone and iPad by greenteg AG. Rated 2.5/5 from 35 ratings. Requires iOS 15.1.
- Rating
- 2.5
- 35 ratings
- Price
- Free
- on the App Store
- Size
- 55 MB
- Age 4+
- Updated
- Sep 22
- 2026 · v2.5.5
Screenshots
About CORE Thermal Sensor
The CORE Thermal Sensor accurately measures your core body temperature and thermal strain on your body – continuously and non-invasively. Thermal data and insights are critical for facilitating safe and effective heat training and for performing optimally on race day. Designed for athletes at all levels, CORE will help to improve your training and performance in your personal adventures or races. IMPORTANT: The CORE app is designed to work with the CORE device which you can order at www.corebodytemp.com Here's how it works: • Set up your CORE sensor: connect your heart rate monitor and sports devices for optimal sensor use. • Measure your thermal vitals during training: mount the newly designed clip on your heart rate strap and snap in the CORE sensor. Shake the sensor to wake it up, wear it and track your thermal data. • Core body temperature: the interior temperature deep in your body, including organs and other tissues. A critical measure during sports, it can reach up to 40°C (104°F) during vigorous activity in hot environments. Be aware that hotter is not better – cooler is faster. • Heat Strain Index: A combination of your core body temperature and skin temperature representing the thermal strain on your body. The real-time feedback on how hard your body is working to stay cool, delivering a value from 0 (no heat strain) to around 10 (extremely high heat strain). • Heat Zones: Your Heat Strain Index divided into easy-to-use zones. Heat Zone 3 will likely lead to a performance loss, BUT it is the needed stimuli to create adaptations in your body. During heat training, strive for time in heat zone 3. During racing, stay cool and prevent a performance loss by staying in heat zone 1 or 2. • Heat Training Load: a cumulative daily metric of the heat strain on your body. A daily value of 10 out of 10 indicates ideal contribution to heat adaptations. More is not always better! • Heat Adaptation Score: Track your heat adaptations over time with effective heat training. Get a heat champion to perform best in the heat. Long-term heat training will most likely lead to improvements also in cool conditions. • Add your passive heat training: Supplementing your active heat training or general training with passive heat exposure in a sauna or hot bath. You can track your sessions in the app manually, contributing to your heat adaptation score. NOTE: do NOT take your CORE sensor into the sauna or hot environments. What else you can do in the CORE app: • Dig into the details: See a breakdown of your thermal data, and even see trends across days, weeks and months. • Share your CORE metrics with your friends through the social sharing feature, earning more kudos and likes • Connect your connectivity accounts (e.g. Garmin) to directly synchronize your data after the training. • Update your sensor to the latest firmware ensuring having the best sensor functionality. Note: CORE provides products and services designed for general fitness and training purposes. For accurate measurement readings during sports, a connection to a heart rate monitor is necessary. CORE products and services are not medical devices, not intended to treat or diagnose any disease, and should not be used as a substitute for professional medical advice, diagnosis or treatment. All content available through CORE products and services is for general informational purposes only.
Ratings & reviews
2.5
35 ratings
What’s new
Version 2.5.5 · Updated September 22, 2026
• Live workout data now syncs continuously, keeping your Heat Training Load stats up to date as you train • Added language support for Polish, Brazilian and Korean • Bug fixes and improvements
App privacy
The developer, greenteg AG, reported these privacy practices to Apple.
Data Linked to You
The following data, which may be collected and linked to your identity, may be used for the following purposes:
- Health & Fitness: Health, Fitness
- Contact Info: Email Address, Name
Used for: Analytics, App Functionality
Alternatives to CORE Thermal Sensor
Looking for apps like CORE Thermal Sensor? Here are 6 similar apps on the App Store. The highest rated is Epic Ride Weather (4.9/5), and all 6 are free to download.
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Hexis Live
2.7
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hDrop App
3.8
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Nix Solo
4.8
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Tymewear
3.7
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EatMyRide: Sports & Nutrition
4.2
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Epic Ride Weather
4.9
| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| CORE Thermal Sensor | 2.5 / 5 (35 ratings) | Free | September 22, 2026 | |
| Hexis Live | 2.7 / 5 (29) | Free | Sep 24, 2026 | Compare |
| hDrop App | 3.8 / 5 (12) | Free | Aug 17, 2026 | Compare |
| Nix Solo | 4.8 / 5 (64) | Free | Sep 24, 2026 | Compare |
| Tymewear | 3.7 / 5 (35) | Free | Oct 1, 2026 | Compare |
| EatMyRide: Sports & Nutrition | 4.2 / 5 (42) | Free | Oct 3, 2026 | Compare |
| Epic Ride Weather | 4.9 / 5 (784) | Free | Oct 1, 2026 | Compare |