you expect and you NEED any app that claims any health-related function, especially one that measures a critical vital sign such as heart rate to be accurate and repeatable.
HeartRateProHealthMonitor simply fails on both accounts.
However, it is ONLY because I know what my heart rate normally is (I use blood pressure monitoring equipment 4 times per day which tells me, that I knew that when I saw a heart rate of 78 - it could not be accurate. So I repeated the measurement several times over and over again, using my fingertips - then different spots including my wrist, too if hand, forehead... And no two readings were even closely repeatable. Only two of the dozen or so readings were close to the actual value of 98, but I got many readings ranging from 68, several in the 70s, and several in the 80s.
By returning these slower rates, it would easily miss what might be life-threatening tachycardia and the complete lack of accuracy and repeatability makes it useless for even routine monitoring.
Not only can I not recommend it, but I must also warn people away from it.