Nuna Biz
App is very limited and either the app or the smart ring firmware are literally making up numbers for heart rate and blood ox sometimes. You can get valid looking readings without even wearing the ring, which means it either can't it's reading is wrong or it is making things up to make it look like it is bettwr at getting a reading then it really is. Either way it's not good. App also can't integrate with Google Fit, so it's rather limited and you can only read the data from the app.
cy bauer
Works with-in reason. I would like to be able to have it measure my blood oxygen level periodically at least while I sleep. The issue is, you have to ask for it by pressing the option. As far as readings, most are good but some are off a bit, don't know if it's the app or device when they are incorrect. My health ring is an inexpensive one so hard to know. I'm content and the readings are not far off.
4 people found this review helpful
Tony C
App is easy to use. Sometimes it has issues connecting to the watch. Usually requiring the phone be restarted. Tested this on different phones. It would be nice to have more control over the custom watchface. To add other meters like battery and steps to a custom background. Support for Signal messaging app would be awesome.