HRV Score Doesn't Match in Apple Health

Your HRV score on Elite HRV and the one that shows up when you are linked to Apple Health will be different. Apple Health's "HRV" slot is asking for SDNN (which is a particular Time Domain measure of HRV). Our HRV score is based on RMSSD (a different Time Domain measure of HRV). So when we send the one that Apple Health is designed to receive, it changes the score. 

Please see articles below for more information on RMSSD, SDNN, and Elite HRV's score.