I absolutely agree. The two most important features to me would be the accurate and measurability of the inputs (heart rate, o2 saturation, etc) and the ability to get that data (API). I don't want my friends to know I just reached 120BPM in my exercise routine, but I may want to set up an app myself to do something based on my heart rate going to a certain level, or better yet, if my parents heart rate meets some threshold it shouldn't be at