Sleep and recovery features on smartwatches
Short answer: 128 models in our catalog list at least one of three recovery-related sensors or scores: heart rate variability (HRV), skin temperature and a readiness score. 69 list both HRV and temperature, and 45 list a readiness score. The catalog has no field for sleep stages or sleep scores, so this page does not rank watches by sleep tracking.
Last verified September 26, 2026.
What these terms mean
HRV is the variation in time between heartbeats, which some watches record and use in their own scores. Skin temperature is a sensor reading at the wrist. A readiness score is a number a maker calculates from several inputs to describe how recovered you are. How a maker calculates it is its own method, and a score from one brand cannot be compared with another. These are wellness features and not medical measurements.
What the catalog lists
| Brand | Models | Models listing HRV | Models listing temperature | Models listing readiness |
|---|---|---|---|---|
| Amazfit | 26 | 8 | 11 | 7 |
| Apple | 9 | 8 | 8 | 3 |
| Blackview | 9 | 0 | 0 | 0 |
| Denver | 8 | 0 | 0 | 0 |
| Fitbit | 8 | 5 | 6 | 0 |
| Garmin | 33 | 31 | 15 | 21 |
| Huawei | 23 | 19 | 12 | 0 |
| Kospet | 15 | 0 | 0 | 0 |
| Maxcom | 15 | 0 | 0 | 0 |
| Mibro | 25 | 0 | 0 | 0 |
| Polar | 10 | 5 | 4 | 5 |
| Samsung | 13 | 10 | 11 | 1 |
| SaveFamily | 9 | 0 | 1 | 0 |
| Tracer | 8 | 0 | 0 | 0 |
| Xiaomi | 19 | 5 | 5 | 0 |
Models that list all three
| Model | Brand | Battery, as listed | Phone compatibility | Release year |
|---|---|---|---|---|
| Amazfit Balance 2 | Amazfit | Up to 21 days | iOS and Android | 2025 |
| Amazfit T-Rex 3 Pro | Amazfit | 25 days (approx.) | iOS and Android | 2025 |
| Amazfit T-Rex Dual Solar | Amazfit | - | iOS and Android | 2026 |
| Amazfit T-Rex Ultra 2 | Amazfit | Up to 30 days · 50+ GPS hours | iOS and Android | 2026 |
| Apple Watch Series 12 | Apple | Up to 24 hours (10 workout hours) | iOS only | 2026 |
| Apple Watch Ultra 3 | Apple | Up to 42 hours · 72 hours saver | iOS only | 2025 |
| Apple Watch Ultra 4 | Apple | Up to 50 hours · 84 hours saver | iOS only | 2026 |
| Garmin Fenix 8 Pro AMOLED | Garmin | Up to 27 days (51 mm) | iOS and Android | 2025 |
| Garmin Fenix 8 Pro MicroLED | Garmin | Up to 10 days | iOS and Android | 2025 |
| Garmin Fenix 9 | Garmin | Up to 29 days (51 mm) | iOS and Android | 2026 |
| Garmin Fenix 9 Pro | Garmin | Up to 31 days · 57 days (solar) | iOS and Android | 2026 |
| Garmin Forerunner 570 | Garmin | Up to 10 days (47 mm) | iOS and Android | 2025 |
| Garmin Forerunner 970 | Garmin | Up to 15 days | iOS and Android | 2025 |
| Garmin Venu 4 | Garmin | Up to 12 days | iOS and Android | 2025 |
| Garmin tactix 8 AMOLED | Garmin | - | iOS and Android | 2025 |
| Garmin tactix 8 Cerakote Edition | Garmin | Up to 29 days | iOS and Android | 2026 |
| Garmin tactix 8 Solar | Garmin | - | iOS and Android | 2025 |
| Pixel Watch 3 | - | Android only | 2024 | |
| OPPO Watch X3 | OPPO | Up to 5 days · up to 16 days in power saver mode | Android only | 2026 |
| Polar Grit X2 Pro | Polar | 10 days · 43 GPS hours (approx.) | iOS and Android | 2024 |
| Polar Street X | Polar | Up to 10 days · 43 GPS hours | iOS and Android | 2026 |
| Polar Vantage M3 | Polar | Up to 7 days · 30 workout hours | iOS and Android | 2024 |
| Polar Vantage V3 | Polar | 12 days · 53 GPS hours (approx.) | iOS and Android | 2023 |
| Galaxy Watch Ultra2 | Samsung | 800mAh · up to 4 days | Android only | 2026 |
What to check before relying on these
Does the watch need to be worn all night, and does its battery allow that with daily charging? Does the score need a subscription, see subscriptions explained? Does the app give you the raw numbers or only a score? Is the watch comfortable on a small case size, see sizes by brand? A watch worn at night needs a light case and a soft strap.
What these features cannot do
They do not diagnose anything, and a single night is not a trend. If you have concerns about your sleep or health, talk to a professional, and do not rely on a watch score.
Before you buy
Check the maker's current description of each feature for your model. Features change with updates. See battery life explained and our methodology.