Ray or Oura Ring 4?
Oura Ring 4 is the best-known smart ring. Here's how a light-powered wristband compares.
Oura Ring 4 is the best-known smart ring, with a polished sleep and readiness app. It starts at $349, needs a membership after the trial ($5.99 a month or $69.99 a year), and charges on a dock every five to eight days. Ray tracks many of the same signals from the wrist instead of your finger, with no membership and no charger.
Chargerless Ray
Oura Ring Gen 3 (earlier model)
The short answer
Choose Oura Ring 4 if you prefer a ring and want Oura's polished sleep and readiness experience, including blood-oxygen sensing. Choose Ray if you want to skip the membership and the charging dock, or you'd rather keep your fingers free.
Oura Ring 4 status: Currently sold.
Side by side
Specs are manufacturer claims and US pricing snapshots, not lab-test results. A blank promise is less useful than a clear tradeoff, so we keep this list deliberately practical.
| What changes | Chargerless Ray | Oura Ring 4 |
|---|---|---|
| Format | Screen-free wristband | Smart ring |
| Power | Light powered; no charging routine | Rechargeable; 5–8 days |
| Screen | None | None |
| Weight | 7 g | 3.3–5.2 g, depending on size |
| US price | $219 silver / $249 gold | From $349 |
| Required subscription | None | $5.99/month or $69.99/year |
| Core tracking | Sleep, heart rate, HRV, temperature, steps and light exposure | Sleep, readiness, activity, HR, HRV, temperature and SpO₂ |
Still weighing fitness trackers? Read what to look for in a tracker you'll want to wear every day.
Neither wins every category
The best tracker is the one whose compromises fit your life—and that you will actually keep wearing.
Why choose Ray
Ray has no dock, no required membership and leaves your fingers free.
Why choose Oura Ring 4
Oura is smaller and has a mature app, established sleep research and SpO₂.
Five-year cost
A simple comparison using today's US list prices. It is not a forecast of promotions, future price changes or replacement cycles.
- Chargerless Ray: $219–$249
- Oura Ring 4: About $699+
$349 starting hardware price plus five years at the current $69.99 annual membership rate; taxes, finishes and promotions excluded.
Common questions
Does Oura Ring 4 require a subscription?
Full Oura app access after the included trial requires membership, currently $5.99 monthly or $69.99 annually in the US.
Does Ray require a subscription?
No. Ray's core app and tracking do not require a recurring plan.
Which is lighter, Ray or Oura Ring 4?
Oura Ring 4 is lighter at 3.3 to 5.2 grams depending on size; Ray weighs 7 grams and is worn on the wrist.
Does Ray include every Oura sensor?
No. Oura includes blood-oxygen sensing; Ray does not. The products also use different form factors and software models.
Research note. Competitor facts were checked against Oura Ring 4 store and membership support on August 20, 2026. Prices, promotions, regional features and announced-product timelines can change. Ray details reflect the current Chargerless product page. Neither product is a substitute for medical care.
Wear your health. Not a charger. Ray tracks the essentials in a 7-gram bracelet powered by light. Silver starts at $219. Gold starts at $249. No required subscription.
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