2 picks
Rings
Smart rings we've tested, and how sure we are of each.
- A smart ring with no subscription Colmi R10 The ring we've tested most: what's below is measured on our own ring, not copied from the box.
- A cheaper ring in the same family Colmi R02 The ring the open-source tools were first written for. We expect it to behave like the R10; we haven't tested one yet.