I use my fitbit because of health issues with my heart. I used to review heart rate from time to time historically. I had an incident and wanted to review several months data I used to be able to do this but this new format is worthless. I can see resting heart rate but not the rate throughout the day. This change has taken turned this watch into more of a toy than a useful device. I will need to review what options are out there from another company.
