I’m impressed by the Bland-Altman plots. I didn’t expect the accuracy to be this good. It’s still not good enough for use in Scandinavia, but has potential for use in communities without proper access to health services.
The next challenge lies in implementation. There’s so many different Android phones. I don’t know how it’s possible to keep the software updated for all of them. We personally had trouble with this in our pulse oximeter app for iOS. AndroidOS is much more differentiated.