1) First, I fixed my awareness of thew volume controls on the Gear S3 (there are 4 separate controls - Ringtone, Media, Notifications, and System)
2) Adjusted Media volume until it worked.
I've used this app on the gear S3 for 6 months. Now I can't get any volume out of the 'coach' feature. Anyone ?? (Yes, I know it's not android, but maybe somebody has the same issue)
Found answer and fixed this... how do I mark it answered.