I went through the entire scan and survey. At the end, it kept saying Upload failed. I tried again which involved doing the entire process all over again and this time I turned off Wifi in case that was the problem. It still failed over and over. Just a note too, the scroll fields for height did not load so I couldn't select my height. I'd like to participate but I don't know what causes it to fail. I'm on iPhone 15 Plus. Thanks.

Once you get to the questions about why you switched from your previous the continue button does not work as you are not able to click it because it is too close to the other option

Went through the instructions without a hitch, but it failed at the end. I decided to give it another try, it scanned again (with more issues this time) and then actually showed me a 3-D scan of my face (which it didn't before)! Took a minute or two to upload, then was successful and said I could close the app.

While this app works fairly well, it ultimately is useless as it is always fails at the end with upload failure. I wanted to contribute to this study very much indeed. The constant failure to upload the results makes me question ResMed interest in improving their products.