Getting Started


CORE will begin shipping at the end of September.

Yes we can offer discounts with volume orders and can offer your branding/white label options.  Please contact us for more information.

CORE can be shipped to most countries that do not have embargoes sanctions.


CORE uses a thermal energy transfer sensor from greenTEG in combination with a sophisticated AI algorithm to calculate the Core Body Temperature. The AI algorithm calculates the Core Body Temperature with the highest accuracy in comparison to other technologies. Due to the greenTEG sensor, this technology has a high accuracy even in a not controlled environment (e.g. under the sun, during intense physical activity, and within a large range of ambient temperatures and humidity)

Thermometers should be compared with one of the gold standards. These are artery, rectal, or e-pill measurements. All of the gold standard methods are invasive and thus not easily useable. CORE’s temperature calculation is compared with the e-pill method. The mean absolute deviation is 0.21°C. In comparison, a professional tympanic sensor has a confidence interval of 0.5 °C, but only if it is used in a controlled environment while at rest and by a health care professional.

Under constant usage the batteries last for over 6 days.

When not actively being used the battery will last weeks.

The product is fully reusable if used with a chest strap. If CORE is used as a patch, the skin-adhesive tape needs to be renewed after a shower. If the device is changed between persons, it can be cleaned with alcohol.

Bluetooth BLE and ANT+ connectivity are supported. CORE is also supporting the Bluetooth thermometer standard. To access data from the CORE from a 3rd party device or app, please contact us.

Yes, CORE is water proof and can be used while swimiing.

CORE is not a medical device. It is not intended to diagnose, treat, cure, or prevent any disease or health condition. It does not have FDA or CE approval.

CORE should be used by healthy adults in a stable environment and is only meant to inform you about your overall wellbeing. No medical advice can be concluded from the measured temperature data, and it cannot replace the services of health professionals. Deviations from the normal temperature range should be investigated by a health care professional. Never disregard professional medical advice or delay in seeking it because of the temperature measurements by CORE. To read the full disclaimer click here.


It is essential to know that different thermometer methods give different core body temperature readings. Generally, a rectal reading is around 0.5 °C higher than an oral reading. And an armpit or forehead scanner is 0.5 °C lower than an oral meeting. Some thermometers take these differences into account and show a temperature with an offset, and some don´t. Therefore it is always important to read the user guide. Our value is the actual (rectal) core temperature. A normal body temperature is between 97°F (36.1°C) to 99°F (37.2°C).

Your Core Body Temperature is not constant during the day. Monitoring your temperature continuously will give you a better insight about your health status. For instance, you can track disease progressions, ovulation, the circadian rhythm, which affects your sleeping patterns, as well as many other use cases.

CORE is not FDA nor MedCE approved. So at this point CORE can not be used as a medical device. Please, check our disclaimer for more information. We will inform you if in the future we will launch a new CORE product which will then undergo FDA approval.


>> Ensure CORE is fully charged with the charging cable supplied

>> Shake CORE (demo) and the green light in the upper left should blink several times

>> Further connection troubleshooting: link

Device is in deep sleep mode or the battery is low. Resolve by charging the battery.

Use the securing clips provided with your CORE.

>> Ensure CORE is in contact with the skin and has the correct orientation
>> Ensure CORE is being used at the correct body location

>> Try disconnecting by exiting the device view and reconnecting to your CORE.

If the problem persists your CORE is having a hard time connecting to our server

>> Try connecting to another WiFi (a firewall might be preventing the connection)

>> Try using Mobile Data (download size is a few Mb)

>> Check your phone's settings and make sure you are not blocking access to websites from there.

Other questions

The energy transfer sensors are manufactured at greenTEG in Switzerland, and CORE is assembled at our partner company in the EU.

We are not accessing the data saved in your app. For more details, please review our privacy policy.

No, there are no licence fees.