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Packed with metrics, including ECG with FDA-cleared AFib detection, and lasts about a week. Circular licensed Oura's patents, so it stays on sale in the US. But both Tom's Guide and WIRED hit app bugs and data sync problems, and the exterior scratches easily.
Subscription: Optional: most features free; some advanced features are paywalled (Tom's Guide)
Top complaints
- Buggy app and lost data
Tom's Guide hit error messages and data sync issues that left gaps in sleep reports, and says you must open the app daily or lose data. WIRED's tester had persistent server issues and processing delays.
- Scratch-prone and protruding sensors
Tom's Guide says it picked up more scratches than other rings and that protruding sensors leave marks on the finger; its roundup calls it more prone to blemishes.
- Thin fitness tracking; ECG didn't work in testing
Only walking and running are auto-detected, and Tom's Guide couldn't get an ECG reading analyzed despite many attempts.
What owners love
- Lots of wellness metrics
Tom's Guide calls the range of holistic insights impressive, including ECG with FDA-cleared AFib detection, and most are subscription-free.
- About a week per charge
Tom's Guide got nearly eight days in performance mode, and the case holds three recharges.
- Easy digital sizing
Sizing works from a phone photo with a credit card, no dummy rings needed (Tom's Guide).
- You want a reliable app
- You want a scratch-resistant finish
- You want workout tracking
- The widest range of wellness metrics without a required fee
- At-home sizing with your phone camera
- A closed charging case for travel
Scores (tap for why)
What experts say
- Tom's Guide: Impressive health features let down by a buggy app with data sync issues; scratch-prone exterior.
- Tom's Guide: 'Also consider': Circular licensed Oura's patents so it's still on sale; clunky app and prone to blemishes.
- WIRED: Honorable mention: pretty and pings you at good times for focus or caffeine, but persistent server issues and data delays.