App downloads to your watch not your phone
Spent about 1 hr total, 2 calls, with Apple support as I was used to apps downloading to phone. They didn’t have a clue that something like this existed. Make sure you purchase with the phone that is linked to the watch. It doesn’t send pitch bend but I used MfxConvert to convert cc to pitch bend an it worked. The first app can be added to a place on the watch face but this one can’t. My SE watch screen shuts off after max of 70 sec. Later models can stay on longer.