The present disclosure relates to the conversion of biometric data to meaningful heath risk indications. According to one aspect, there is provided a method of determining a health risk indicator for a user by: obtaining heart rate data for the user recorded over a monitoring period of at least one day processing said heart rate data in dependence on biometric data for the user to determine an aggregate heartbeat value for the user over said monitoring period and determining said health risk indicator in dependence on said aggregate heartbeat value.
