This is a ring to track your sleep, not more than that!
Very soon after the purchase of my ring, I started contacting the team because the data on my activity is not accurate. This ring does not detect activity, this means you will have to manually add all of your activity in order for the statistics to be accurate (and know the time you've done that activity, which means you will have to always look at the clock when you're about to do something).
The client service team ignores my questions and answers me with some marketing stuff and reasons the activity is not detected. The ring is simply not made for that.
Pros and Cons:
Bottom Line: No, I would not recommend this to a friend