The world's smallest smart ring: The Ring 5 is 40% smaller than the Ring 4 — 6.09mm wide and 2.28mm thick, weighing as little as 2 grams — while improving sensor accuracy across finger sizes and skin tones.
Current model just released
Updated August 20, 2026 · 3 picks, ranked
Smart rings are the newest wearable category, and the market is really a three-way fight: Oura's polish and app depth, Samsung's Galaxy Ring ecosystem play, and RingConn's no-subscription value pitch. The right choice depends less on sensors — they're converging fast — and more on ongoing cost and which phone you carry.
This list ranks every current smart ring we track, with the subscription math spelled out and our buy-or-wait radar on each. Ring generations are young and moving quickly; buying weeks before a successor is a real risk in this category.
The world's smallest smart ring: The Ring 5 is 40% smaller than the Ring 4 — 6.09mm wide and 2.28mm thick, weighing as little as 2 grams — while improving sensor accuracy across finger sizes and skin tones.
Current model just released
$349 with no subscription, ever: All health tracking features are included at no extra cost. No monthly membership required — sleep staging, HRV trends, vascular insights, and health reports are all free in the app.
Current model just released
No subscription, ever: Unlike Oura Ring which requires a $5.99/month membership for full features, the Galaxy Ring's complete feature set is included in the $399.99 purchase price with no recurring fees.
Late in cycle — a new model is likely coming
| Model | Price | Battery | Weight | Water res. | Timing |
|---|---|---|---|---|---|
| Oura Ring | $399 | ~7 d | 3 g | 100m | ⏰ Buy now |
| RingConn Gen 3 | $349 | ~14 d | 3 g | 10ATM | ⏰ Buy now |
| Samsung Galaxy Ring | $399 | ~7 d | 3 g | 10ATM | ⏰ Wait |
Oura's full feature set requires a monthly membership; RingConn and Samsung's Galaxy Ring don't charge one. Over a typical three-year lifespan, the subscription can cost more than the ring itself — factor it into any comparison.
Rings, generally. They're more comfortable to sleep in, last about a week per charge, and their sleep-stage tracking is at least as good. What you give up is a screen, workouts and notifications.
Current-generation rings, scored on tracking depth and total cost of ownership including subscriptions, with release-cycle position as the tiebreak and the source of each buy/wait badge. Each pick's device page has the full timing breakdown.
Rankings combine our editor scores with live release-cycle data and are recomputed on every site update. See how we rate.