Apple watch and runkeeper with music at same time distorts the music
I can not get good music reception from my watch when I am using the Runkeeper fitness app from the watch only. It seems the Bluetooth can not support two apps at the same time. I have had the same problem with two different type of Bluetooth headphones. Rowkin stereo bits and Backbeat fit. This when I use the watch only apps.
Apple Watch Series 2, iOS 10.3.1