Smart Rings / Oura
Oura Ring 4 (2024)
The widest size range Oura sells, now heavily discounted — same subscription, though.
Overall score 7.4/10
Pros
- + Sizes 4 to 15 — if the Ring 5's 6-13 window excludes you, this is the Oura that fits
- + Now routinely $249 in silver or black, $100 under its own list price, for sensing that is a generation behind at most
- + Recessed sensors mean no protruding domes pressing into the finger, unlike the Circular Ring 2
- + Same app, same membership, same iOS/Android parity as the Ring 5
Cons
- − The $5.99/month membership still applies, so three years costs $458.97 even at the discounted hardware price
- − Noticeably chunkier than the Ring 5 — that is the whole reason the Ring 5 exists
- − Discounted stock is concentrated in Silver and Black; Gold and Rose Gold still list at $499
- − Warranty covers manufacturing defects only, not the scratches titanium picks up in normal wear
- − Amazon listings are per size and per colour, so the ASIN you click must match the size you actually need
Oura Ring 4 (2024) review: what the specs say
The widest size range Oura sells, now heavily discounted — same subscription, though. At $249, Oura's 2024 model sits in the middle of the range — the smart Rings we compare run from $149.99 to $479. It scores 7.4/10 overall, calculated from published specifications across 8 categories rather than from a subjective impression.
Its strongest showing is Sleep Tracking at 9.3/10 — sleep staging depth, overnight accuracy and how usable the morning report is. The weakest is Subscription Freedom at 2.0/10, which is the trade-off to weigh before buying: if that is the specification you care about most, one of the alternatives below will serve you better.
Worth knowing before you buy: the $5.99/month membership still applies, so three years costs $458.97 even at the discounted hardware price; and noticeably chunkier than the Ring 5 — that is the whole reason the Ring 5 exists. Every specification on this page comes from Oura's own documentation or a verified retail listing — where a figure is not published, the table says so rather than estimating it.
Specifications and price last verified . Report an error
Full Specifications
| Battery Life (claimed) | 8 days |
| Battery, In Practice | Oura publishes 5-8 days and states outright that it varies with ring size, app settings and activity level. Smaller sizes are nearer 5. Charging takes 20-80 minutes depending on how flat it is. |
| Subscription | Required in practice. $5.99/month or $69.99/year after one free month, on exactly the same terms as the Ring 5 — the membership is per account, not per ring, so upgrading later does not cost a second subscription. |
| 3-Year Cost of Ownership | 458.97 $ |
| Sizes Offered | US 4-15, no half sizes — the broadest range here, and the reason to buy the older generation if your finger is very small or very large |
| Sizing Kit | Free plastic sizing kit ships before the ring; wear the sizer at least 24 hours including overnight. Budget about a week before the real ring is ordered. |
| Returns & Size Exchange | Oura does not publish a return window on its warranty page. The 1-year limited warranty excludes scratches, dents and batteries, and secondhand purchases from unauthorised resellers are not covered at all. |
| Measured vs Inferred | Green plus infrared LEDs for continuous heart rate and HRV, red plus infrared for blood oxygen reported overnight rather than continuously, an NTC skin-temperature sensor and an accelerometer. Readiness, Stress and Resilience are derived scores on top of those signals. |
| FDA Clearance | None published. Oura markets the ring and app as general wellness, not as a medical device. |
| Water Rating | Water resistant to 100m/328ft |
| Phone Support | iOS and Android, full feature parity |
| Charger & Data Export | Proprietary size-specific dock plus USB-C cable in the box; the Ring 5 charger is a different part. Export: not published as a one-click history download; Oura documents a personal-access-token Cloud API. |
| Connectivity | Bluetooth Low Energy (version not published by Oura) |
| Material | Titanium inside and out, with a seamless non-allergenic titanium interior |
| Warranty | 12 months |
Compare Oura Ring 4 (2024) With
Premium Alternative
Samsung Galaxy Ring (2024) — $299.99