Galaxy Watch8 40mm vs OnePlus Watch 4
Which one should you buy?
Who leads where?
- CaseGalaxy Watch8 40mm
- Battery and ChargingOnePlus Watch 4
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.
The differences in short
Case Size: Galaxy Watch8 40mm 40 mm, OnePlus Watch 4 47.4 mm. OnePlus Watch 4 leads on Battery Life: up to 120 hours against up to 40 hours. ECG App is the same on both: Yes. Water Resistance is the same on both: 5 ATM.
Which one for what you do?
Health Tracking
Galaxy Watch8 40mm
77% – 65%
Sport & Outdoors
OnePlus Watch 4
84% – 58%
Battery Life
OnePlus Watch 4
76% – 50%
Daily Use
Galaxy Watch8 40mm
71% – 50%
The percentages are Kacbu Match scores: computed from official specifications for that use, with no price in them.
 SamsungGalaxy Watch8 40mmNo reviews yet |  OnePlusOnePlus Watch 4No reviews yet | |
|---|---|---|
| Key Differences | ||
| Case Size | 40 mm | 47.4 mm |
| Battery Life | up to 40 hours | up to 120 hours |
| ECG App | Yes | Yes |
| Water Resistance | 5 ATM | 5 ATM |
| Health Sensors and Features | ||
| Heart Rate Sensor | Yes | Yes |
| SpO2 Sensor | Yes | Yes |
| ECG Sensor | Yes | No data |
| Skin Temperature Sensor | Yes | Yes |
| ECG App | Yes | Yes |
| Atrial Fibrillation Notification | Yes | No data |
| Sleep Tracking | Yes | Yes |
| Fall Detection | Yes | Yes |
| Display | ||
| Size | 1.3" | No data |
| Panel | Super AMOLED | OLED (LTPO) |
| Resolution | 438x438 | 466x466 |
| Peak Brightness | 3000 nit | 3000 nit |
| Always-On Display | Yes | No data |
| Case | ||
| Case Size | 40 mm | 47.4 mm |
| Case Thickness | 8.6 mm | 11 mm |
| Weight | 30.0 g | 43 g |
| Case Material | Aluminum | Titanium alloy |
| Front Glass | No data | Sapphire crystal |
| Positioning and GNSS | ||
| GNSS Receiver | Yes | Yes |
| Dual-Band GNSS | Yes | Yes |
| GNSS Systems | GPS, Glonass, Beidou, Galileo | GPS, GLONASS, Beidou, Galileo, QZSS |
| Battery and Charging | ||
| The figure the maker states | up to 40 hours | up to 120 hours |
| What that figure measures | With always-on display off | In smartwatch mode |
| Capacity | 325 mAh | 646 mAh |
| Charging Type | No data | Fast charging |
| Water and Dust Resistance | ||
| Water Resistance | 5 ATM | 5 ATM |
| IP Rating | IP68 | IP69 |
| MIL-STD-810 | MIL-STD-810H | MIL-STD-810H |
| Performance | ||
| RAM | 2 GB | 2 GB |
| Storage | 32 GB | 32 GB |
| Connectivity | ||
| Cellular | Optional | No data |
| Wi-Fi | Wi-Fi 4 | No data |
| Bluetooth | 5.3 | 5.2 |
| NFC | Yes | Yes |
| Software | ||
| Operating System | Wear OS | Wear OS 6.0 |
The two products are level on the compared specs.
This table is based on manufacturers official specifications. Winning on paper does not always mean a difference in everyday use.