Compare up to 10 devices across categories. Keep the purpose and the source beside the numbers.
Lowest recorded store prices take priority over announced or launch prices, within the selected source market. Currencies use the dated EUR reference rates. Deposits and recurring charges are excluded from price order; missing prices stay last. Original price records remain visible.
A narrow sleep-tracking ring made in Japan
Keep in mind The slimness and battery figures still need independent testing. This is a long wait, with certification-dependent country support and specifications still subject to change. Sleep-apnea tendencies are not a verified diagnosis.
Sleep, recovery and daily activity trends
Keep in mind Native US and UK ring prices were not verified; membership prices for those regions were verified.
Published specifications and documented constraints. See the full comparison below for prices and sources.
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| Smart ringsAdd a model |  |  |
|---|---|---|
| Prices · all markets | Price not verified 0 offer records & sourcesNo verified price in this audit. | €265.30 EUR≈ $297 USDECB 2026-10-12EU · Store price · Listed 1 offer records & sources€265.30 EUR≈ $297 USDECB 2026-10-12 EU · Store price ListedSilver; ring size unselected; LT delivery Official LT/EUR store lists a discounted ring price of €265.30 (regular reference €379). Manufacturer metadata adds €15 LT shipping. Size-specific stock, expiry and final checkout total are unverified.Price source ↗ Checked 2026-10-12 |
| Designed for | A narrow sleep-tracking ring made in Japan ↗ | Sleep, recovery and daily activity trends ↗ |
| Tracking | Not verified | Sleep stages, heart rate, overnight HRV and SpO2, temperature trends, activity, stress and recovery insights ↗ |
| Sensors | Sleep stages, heart rate, HRV, SpO2, steps and stress ↗ | Green/infrared PPG, red/infrared blood-oxygen LEDs, digital temperature sensor and accelerometer ↗ |
| Battery / power | 7-10 days, up to 10 maximum (manufacturer claim) ↗ | Typically 5-8 days; about 20-80 minutes recharge ↗ |
| Battery context | Manufacturer maximum; size and settings can change actual runtime ↗ | Manufacturer estimate; ring size, features, battery age and use dependent ↗ |
| Water / dust rating | Not verified | 100 m; manufacturer excludes diving ↗ |
| Connection & compatibility | English companion app planned for Kickstarter units ↗ | Bluetooth LE; Oura app requires iOS 16+ or Android 11+ with Google Play services and phone Bluetooth 5.0 support ↗ |
| Material | Not verified | Titanium inner and outer surfaces; finish-dependent PVD or DLC coating ↗ |
| Fit & sizing | Not verified | Use Oura Ring 4 sizing kit; Ring 5 sizing kit differs ↗ |
| Weight | Not verified | 3.3-5.2 g depending on ring size ↗ |
| Subscription | No subscription ↗ | Membership for detailed insights: US $5.99/month or $69.99/year; EU €5.99/month or €69.99/year; UK £5.99/month or £69.99/year; first month free for eligible new members ↗ |
| Ring width | 5.19 mm (manufacturer claim) ↗ | Not verified |
| Thickness | Not verified | Not verified |
| Materials | Not verified | Not verified |
| Controls | Not verified | Not verified |
| Payments & haptics | Not verified | Not verified |
| Availability | Kickstarter funded and ended October 10, 2026; official site says limited late pledges are open. Delivery not yet claimed. May-July 2027. Current late-pledge reward price not exposed in accessible campaign text; do not reuse the ended $1 price-pass offer as a product price. | Official Ring 4 store and support pages remain available. A current EUR storefront offer was verified; US/UK ring prices could not be verified in this geo-specific session. |
| Important context |
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| Editorial pick & release | #1 · Upcoming Smart ringsExpected: May-July 2027SOXAI RING X backer delivery, certified destinations only | #4 · Our Top 10 Smart ringsReleased: Oct 15, 2024US retail availability directly reported by the retailer |
| Evidence | Manufacturer source Checked 2026-10-12 | Manufacturer source Checked 2026-10-12 |
Battery claims use different conditions and are not a controlled benchmark. “Not verified” is an evidence gap, not a missing feature. Prices are dated regional snapshots. Deposits, bundles and historical launch prices are labelled. Brightness measurement methods and battery workloads vary by manufacturer.
