Apple Watch Ultra 3 vs OnePlus Watch 3 43mm
Which one should you buy?
Who leads where?
- KasaOnePlus Watch 3 43mm
- Battery and ChargingOnePlus Watch 3 43mm
- PerformanceApple Watch Ultra 3
Wins are counted from the official values in the table below; the BUY / CONSIDER / WAIT call comes from each product's own decision box. We do not predict prices.
 AppleApple Watch Ultra 3No reviews yet |  OnePlusOnePlus Watch 3 43mmNo reviews yet | |
|---|---|---|
| Key Differences | ||
| Case Size | 49 mm | 43.2 mm |
| Processor | Apple S10 | Qualcomm Snapdragon W5 Gen 1 |
| Battery Life | up to 42 hours | up to 60 hours |
| ECG App | Yes | No data |
| Water Resistance | 100m | No data |
| Health Sensors and Features | ||
| Heart Rate Sensor | Yes | No data |
| SpO2 Sensor | Yes | No data |
| ECG Sensor | Yes | No data |
| Skin Temperature Sensor | Yes | No data |
| ECG App | Yes | No data |
| Atrial Fibrillation Notification | Yes | No data |
| Sleep Tracking | Yes | Yes |
| Fall Detection | Yes | Yes |
| Crash Detection | Yes | No data |
| Display | ||
| Size | No data | 1.32" |
| Panel | OLED (LTPO3) | AMOLED |
| Resolution | 422x514 | 466x466 |
| Peak Brightness | 3000 nit | No data |
| Always-On Display | Yes | No data |
| Kasa | ||
| Case Size | 49 mm | 43.2 mm |
| Case Thickness | 12 mm | 11 mm |
| Weight | 61.6 g | 37.8 g |
| Case Material | Titanium | Stainless steel |
| Positioning and GNSS | ||
| GNSS Receiver | Yes | No data |
| Dual-Band GNSS | Yes | No data |
| GNSS Systems | GPS, GLONASS, Galileo, QZSS, BeiDou | No data |
| Battery and Charging | ||
| The figure the maker states | up to 42 hours | up to 60 hours |
| What that figure measures | Normal use | In smartwatch mode |
| Capacity | No data | 354 mAh |
| Charging Type | Fast charging | Fast charging |
| Water and Dust Resistance | ||
| Water Resistance | 100m | No data |
| IP Rating | IP6X | No data |
| Rated Depth | 40 m | No data |
| MIL-STD-810 | MIL-STD-810H | No data |
| Performance | ||
| Processor | Apple S10 | Qualcomm Snapdragon W5 Gen 1 |
| RAM | No data | 2 GB |
| Storage | 64 GB | 32 GB |
| Connectivity | ||
| Cellular | Optional | No data |
| Wi-Fi | Wi-Fi 4 | No data |
| Bluetooth | 5.3 | No data |
| Speaker | Yes | No data |
| Microphone | Yes | No data |
| Software | ||
| Operating System | watchOS | No data |
| Phone Compatibility | iPhone 11 or later (iOS 26+) | No data |
OnePlus Watch 3 43mm leads on 3 of 4 compared specs.
This table is based on manufacturers official specifications. Winning on paper does not always mean a difference in everyday use.