Mall-32%Smart ring comparison
Smart rings track sleep, heart rate and activity with no screen. Check three things before buying: battery, subscription and size.
| Model | Battery | Water resistance | Subscription | Phones |
|---|---|---|---|---|
| Oura Ring 4 | About 8 days | 100 m | Yes, monthly | iOS, Android |
| Samsung Galaxy Ring | About 7 days | 10 ATM, IP68 | None | Android |
| Ultrahuman Ring Air | 4 to 6 days | 100 m | None | iOS, Android |
| RingConn Gen 2 | 10 to 12 days | 100 m | None | iOS, Android |
| Amazfit Helio Ring | About 4 days | 10 ATM | None | iOS, Android |
Figures follow manufacturer claims at the time of writing and may change by version; confirm on the maker’s site before buying. Health readings are for reference and do not replace medical devices.
Sizing a smart ring
- Smart rings cannot be resized. Use that maker’s own sizing kit.
- Wear the test ring for about 24 hours, including sleep, since fingers swell and shrink with temperature.
- The index finger usually gives the steadiest sensor signal.
