Smart Ring Comparison Chart: 14 Rings by Price & Battery

Specs table

12 of 15 wearables

Model Form US price Battery Weight Screen Membership Tracking Availability Source
Chargerless Ray Band From $219 Up to about 60 days in darkness from a full charge; daylight tops it up. 7 g without band None See current offer Sleep, heart rate, HRV, temperature, steps and light exposure; cycle tracking Currently sold Test results
Amazfit Helio Ring Ring $149.99 Rechargeable; about 4 days 3.65 g (size 8) to 3.82 g (size 12) None None Sleep, recovery, HR, HRV, SpO₂, stress and EDA; cycle tracking; temperature Currently sold View sourceAugust 20, 2026
Luna Ring 2.0 Ring $300 Rechargeable; up to 5 days, case up to 30 days 3 to 5 g by size None None Sleep, readiness, activity, HR, HRV, temperature and SpO₂ Currently sold View sourceAugust 20, 2026
Oura Ring 4 Ring $349 to $399 Rechargeable; 5–8 days 3.3–5.2 g, depending on size None $5.99/month or $69.99/year Sleep, readiness, activity, HR, HRV, temperature and SpO₂; cycle tracking Currently sold View sourceAugust 20, 2026
Oura Ring 4 Ceramic Ring $399 on Oura's store (list $499) Rechargeable; 5–8 days 5.1–8.1 g, depending on size None Oura Membership $5.99/month for full features Sleep, readiness, activity, HR, HRV, temperature, SpO₂ and cycle tracking Currently sold View sourceNovember 12, 2026
Oura Ring 5 Ring $399 to $499 Rechargeable; 6–9 days From 2 g, depending on size None Oura Membership $5.99/month for full features Sleep, readiness, activity, HR, HRV, temperature, SpO₂ and cycle tracking Currently sold View sourceNovember 12, 2026
RingConn Gen 2 Ring $269 sale / $299 list Rechargeable; 10–12 days plus case 2 to 3 g by size None None Sleep, activity, HR, HRV, temperature, SpO₂ and sleep-apnea screening; cycle tracking Currently sold View sourceAugust 20, 2026
RingConn Gen 2 Air Ring $199 Rechargeable; up to 10 days 2.5 to 4 g by size None None Sleep, activity, HR, HRV, temperature and SpO₂; cycle tracking Currently sold View sourceAugust 20, 2026
RingConn Gen 3 Ring $349 to $369 Rechargeable; 10–14 days depending on vibration 2.5 to 3.5 g by size None None Sleep, activity, recovery, HR, HRV, temperature and SpO₂; cycle tracking Currently sold View sourceAugust 20, 2026
Samsung Galaxy Ring Ring $399.99 Rechargeable; up to 7 days 2.3 to 3.2 g by size None None Sleep, activity, HR, temperature and energy score; cycle tracking Currently sold View sourceAugust 20, 2026
Ultrahuman Ring AIR Ring $349 Rechargeable; up to 6 days 2.4 to 3.6 g by size None None for core features; paid PowerPlugs optional Sleep, movement, recovery, HR, HRV and temperature; cycle tracking Currently sold View sourceAugust 20, 2026
Ultrahuman Ring PRO Ring $399 to $479 Rechargeable; current store gives no battery-life figure 3.3 to 4.8 g by size None None for core features; paid PowerPlugs optional Sleep, movement, recovery, HR, HRV and temperature; cycle tracking Currently sold View sourceAugust 20, 2026

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Smart ring comparison chart

This smart ring comparison plots 14 smart rings on one chart. Chargerless Ray, a light-powered band, is included for reference. Compare them by price against battery life, weight, thickness or case volume, narrow the list with the sliders, tick the tracking you need (heart rate, sleep, temperature, cycle tracking) and choose where you want to wear it. Hover a photo for its specs, or open its full comparison with Chargerless Ray.

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How the comparison works

Prices are snapshots from the linked sources. The price axis uses listed US prices, or the first year for WHOOP; where a model comes at several prices, it sits at the middle of the range. Battery points use published upper estimates for the device and about 60 days of dark reserve for Ray. Usage and test conditions vary. Weight points use the lightest listed configuration. Thickness and case volume use published case dimensions without the strap, in the smallest listed size; a ring's volume is the band itself at US size 10. A missing number leaves a device off that chart axis, while its full specs stay in the table.

Common questions

What does this smart ring comparison cover?
14 smart rings, including 3 that are discontinued or not currently on sale and kept for reference. Chargerless Ray, a light-powered band, is included for reference. Each one is plotted by price against battery life, weight, thickness or case volume.
Which smart rings work without a subscription?
9 of the currently sold wearables here list no required subscription: Chargerless Ray, Amazfit Helio Ring, Luna Ring 2.0, RingConn Gen 2, RingConn Gen 2 Air, RingConn Gen 3, Samsung Galaxy Ring, Ultrahuman Ring AIR and Ultrahuman Ring PRO. The specs table shows each maker's membership terms.
How is battery life compared?
Battery points use each maker's published upper estimate, and about 60 days of dark reserve for Chargerless Ray, which also tops up from light. Real runtime varies with settings and use.
How are thickness and volume measured?
From published case dimensions without the strap, in the smallest listed size. A ring's volume is the band itself at US size 10.
Where do the prices come from?
Prices are snapshots of listed US starting prices from the sources linked in the specs table. WHOOP shows its first year of membership.