Had the app for 3 years and has worked very my huawei p30 pro, but 1 week ago the app stopped connecting to my phone and I am unable to use the galaxy watch 4 now. Contacted Samsung and they can't tell me but on occasion they tell me that its because samasung don't support 3rd party devices on there samsung devices, when I tell them that I have had it working for 3 years. They just don't know, I have a £300 usles watch now