Does not work
I downloaded this to get blood oxygen on my Ultra 2. It does not warn you that this does not work on this watch. I could not test it first, it required a purchase which I purchased the lifetime. Well you got my money and it does not work. The funny part here is after you install, you have to download the stock blood oxygen app, then sync it. Well if it didn’t work on the original app why would this app work. This seems like a major scam. I bought the app because the original app didn’t work not to get an app that talks to an app that doesn’t work. I want my money back.