CORE body temperature monitor

CORE is the first solution to monitor your core body temperature continuously and non-invasively. Designed for athletes at all levels, it will allow improving your training and competitive performance through real-time monitoring.

IMPORTANT: The CORE app is designed to work with the CORE device which you can be ordered at

1. What does CORE do?

CORE helps you track a critical metric for sports performance: core body temperature. This is the interior temperature of the body – including organs and other tissues – which only changes due to physiological processes, such as illness, intense activity, circadian cycles or ovulation.

It’s a widely known physiological fact that the core body temperature rises when doing sports. It is common for some people to exceed 40°C (104°F) during high-intensity training and competition (values vary across individuals).

Above a certain threshold, an elevated core body temperature triggers the cooling mechanism in your body. This diverts blood flow away from power generation and uses up to 70% of cardiac output for thermoregulation. This significantly impacts, athletic performance and in extreme situations can result in blow-outs .

CORE will reveal your personal core body temperature threshold. This will help you to train to improve your response to heat and achieve the performance gains you are looking for. You can also use CORE to make better strategic decisions.
For more information about the training protocols enableds by CORE, please visit: our website at

CORE can also be used beyond sports for everyday monitoring of well-being and personal health. It is approved to be sold in the USA as a 'clinical thermometer'. - For complete full details, visit:

2. Get Access your data at any time

CORE stores your data in the device and connects to the app to display it. The data is also pushed to a cloud solution, where you can view it and download it for further analysis. You can even use CORE when not carrying your phone. The data will be stored in the device, and you only need to sync it with the app to push all the data to your online account.

3. Why is CORE different from other solutions?

Prior to CORE, only invasive methods such as probes or ingestible e-pill's were available. For the first time, CORE provides an accurate, continuous, non-invasive solution for monitoring core body temperature, regardless of the activity and environment. CORE’s measurement of core body temperature is accurate to within 0.21°C accuracy.

As proof of its unique value, CORE is already used by UCI World Teams and top triathletes worldwide. The full list of users is available at:

4. How does it work?

The CORE device clips onto your heart-rate monitor belt or sports bra. It can also be worn using specially designed patches. For best results, wear CORE on the same side as your Garmin or Wahoo watchdevice.
CORE supports ANT+ and works with most Garmin Connect IQ and Wahoo devices.

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What's New

- new setting to allow standby mode of CORE to improve battery life
- various UI/UX fixes
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Additional Information

September 14, 2021
Current Version
Requires Android
5.1 and up
Content Rating
Offered By
greenTEG AG
Hofwisenstr. 50A 8153 Rümlang Switzerland
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