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 and daily health trends
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. | $349 USD≈ €312 EURECB 2026-10-12Global · Store price · Listed 1 offer records & sources$349 USD≈ €312 EURECB 2026-10-12 Global · Store price ListedFuture Silver / 6 Official listed price; stock and final checkout cost are not independently verified.Price source ↗ Checked 2026-10-12 |
| Designed for | A narrow sleep-tracking ring made in Japan ↗ | Sleep and daily health trends ↗ |
| Tracking | Not verified | Sleep and apnea-pattern insights, activity, HR/HRV, temperature and cycle trends; vibration alerts ↗ |
| Sensors | Sleep stages, heart rate, HRV, SpO2, steps and stress ↗ | Optical heart-rate sensor, temperature sensor and accelerometer ↗ |
| Battery / power | 7-10 days, up to 10 maximum (manufacturer claim) ↗ | Up to 14 days; 10-12 days with vibration enabled ↗ |
| Battery context | Manufacturer maximum; size and settings can change actual runtime ↗ | Manufacturer estimate; settings and use dependent ↗ |
| Water / dust rating | Not verified | IP68 / 10 ATM, manufacturer rating ↗ |
| Connection & compatibility | English companion app planned for Kickstarter units ↗ | Bluetooth 5.0; iOS 17+/Android 10+ ↗ |
| Material | Not verified | Titanium and epoxy resin ↗ |
| Fit & sizing | Not verified | Use the model-specific sizing kit ↗ |
| Weight | Not verified | 2.5-3.5 g ↗ |
| Subscription | No subscription ↗ | No required subscription ↗ |
| 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 product listing verified. Specific stock, shipping destinations, taxes and checkout totals must be confirmed for the selected configuration. |
| Important context |
| No additional audit note. |
| Editorial pick & release | #1 · Upcoming Smart ringsExpected: May-July 2027SOXAI RING X backer delivery, certified destinations only | #2 · Our Top 10 Smart ringsReleased: May 29, 2026Initial sales in stated launch markets |
| 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.
