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.
Sleep/activity signals and vibrating alerts
Keep in mind Wellness signals and app-derived sleep/activity scores are not a medical diagnosis. Fit, firmware and personal physiology affect readings.
Original sleep and daily-movement tracking
Keep in mind Wellness signals and app-derived sleep/activity scores are not a medical diagnosis. Fit, firmware and personal physiology affect readings.
Published specifications and documented constraints. See the full comparison below for prices and sources.
Scroll across the table to compare every model
| Smart ringsAdd a model |  |  |
|---|---|---|
| Prices · all markets | Price not verified 0 offer records & sourcesNo verified price in this audit. | Price not verified 0 offer records & sourcesNo verified price in this audit. |
| Designed for | Sleep/activity signals and vibrating alerts ↗ | Original sleep and daily-movement tracking ↗ |
| Sensors | Infrared/red/green optical LEDs, 3-axis accelerometer, digital temperature ↗ | Not verified |
| Battery / power | Non-replaceable 24-31 mAh Li-ion ↗ | Not verified |
| Material | Not verified | Zirconia ceramic (ZrO2) ↗ |
| Weight | 2 g ↗ | Not verified |
| Controls | Tap-reactive button and vibration motor ↗ | Not verified |
| Form factor | Slim smart ring ↗ | First-generation smart ring ↗ |
| Dimensions | 8.8 mm wide × 2.2 mm thick ↗ | Not applicable to this category |
| Memory | Up to 20 days data ↗ | Not applicable to this category |
| Runtime | Up to 5 days ↗ | Not applicable to this category |
| Charging | Approximately 60 minutes ↗ | USB-connected charger with white LED ↗ |
| Wireless | Bluetooth LE 4.2-5.0 ↗ | Not applicable to this category |
| Fit | US 6-13 ↗ | Not applicable to this category |
| Leds | Not applicable to this category | Infrared LEDs for nighttime biosignals ↗ |
| Motion | Not applicable to this category | 3D accelerometers ↗ |
| Temperature | Not applicable to this category | Nighttime skin-temperature sensor ↗ |
| Inner Surface | Not applicable to this category | Non-metallic, nickel-free moulding ↗ |
| Availability | Maker Slim manual and original physical review verified. Current original-model retail price and stock not established. | Oura says Gen1 purchase, customer support and firmware/software updates are no longer supported. |
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| Editorial pick & release | No editorial ranking recorded | No editorial ranking recorded |
| Evidence | Manufacturer source Checked 2026-10-13 | Manufacturer source Checked 2026-10-13 |
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.
