Compare up to three models from one category. Keep the purpose and the source beside the numbers.
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.
