When you are wearing CORE, it will continue to record.
CORE has an internal memory which stores data, even when disconnected from the CORE App for Android or iOS. The next time you start your app and connect, the App will synchronise and load the metrics.
Currently in the CORE App you can view 48h of your history, but that will increase soon as we will roll-in cloud compatibility by the end of the year. Stay tuned for new app updates.
If you are using another device such as a compatible Wahoo or Garmin cycle computer or watch, CORE must remain within range to record the core body temperature metrics to the FIT file.