Health app (iOS) shows heart rates in one of two fashions...high and low on a graph for each hour, which is far too little information to be of any benefit, and every data point in list format. However, during Exercise mode on Watch, the heart rate is listed every 6-7 seconds, which is far too much information to be of any benefit. I'd love to find an app that works with Watch that charts heart rates on a minute by minute basis against the various heart rate zones. This way, during exercise you can see how much time you spent in anaerobic, recovery, etc. Does one exist? Thanks!