Core is a useful wearable body temperature sensor for those battling heat training – but there are some fundamental snags to iron out. Core Body Temperature Sensor is an unobtrusive way for ...

Core promises to transform winter workouts with its body heat temperature sensor - here’s my take on using this device as a professional athlete ...

Google has a support page detailing how to use the body temperature sensor, and you'll need to slowly swipe the phone across your entire face over four seconds to get a reading.