Not everyone wants a chunky smartwatch. Whether you’re after something more discreet, more comfortable at night, or just better at tracking specific metrics, the market has exploded with alternatives.
1. Circular Ring 2
The most advanced smart ring on the market. FDA-cleared ECG, AFib detection, continuous HRV, SpO2, breathing rate and temperature — all from a 2.8g titanium ring. No subscription required.
“The only ring with a real ECG sensor — not an estimate. That matters for AFib detection.”
2. Oura Ring Gen 4
Still a strong contender for sleep tracking. Comfortable, accurate, and stylish. But no ECG, no AFib — and a $6/month subscription kicks in after the first year.
3. Ultrahuman Ring Air
The lightest ring on this list. Good sleep and recovery tracking, no subscription. Lacks the sensor depth of Circular but is a solid daily driver for the basics.
4. Whoop 4.0
Subscription-only at $30/month, worn on the wrist or bicep. Loved by athletes for strain and recovery. No display, no ECG, and you’ll pay more over time than any ring on this list.