Between the Watch Series 10 (46mm) and OnePlus Watch 3, the Watch Series 10 (46mm) comes out ahead in weight / display size, while the OnePlus Watch 3 wins on battery life / peak brightness. Overall, the Watch Series 10 (46mm) scores 62.7 and the OnePlus Watch 3 scores 53.9 on our Mars Score.
Which should you buy?
The Watch Series 10 (46mm) is the clear pick on raw spec strength, leading by 8.8 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the Watch Series 10 (46mm) if you carry the device everywhere and weight or thickness has been the deciding factor before. The biggest gaps in its favor are weight, display size, cellular.
Pick the OnePlus Watch 3 if your top frustration with your current device is running out of charge before the day ends — endurance is the lead spec here. Its strongest claims are battery life, peak brightness.
Both ship with comparable ecg, spo2, water resistance, so those specs do not separate the two — focus on the differences below.
Bottom line: the Watch Series 10 (46mm) is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Apple - Watch Series 10 (46mm) wins
- ▲Weight — 44.60 g less. 36.4 vs 81.
- ▲Display size — 36.00% more. 2.04 " vs 1.5 ".
- ▲Has Cellular.
Why OnePlus Watch 3 wins
- ▲Battery life — 566.67% more. 120 h vs 18 h.
- ▲Peak brightness — 10.00% more. 2200 nits vs 2000 nits.
Spec comparison
Design
| Spec | Apple - Watch Series 10 (46mm) | OnePlus Watch 3 |
|---|---|---|
| Case size | 46 mm | 46.5 mmlead |
| Weight | 36.4 glead | 81 g |
| Case material | aluminum | stainless steel |
| Water resistanceⓘ | 5 ATM | 5 ATM |
Display
| Spec | Apple - Watch Series 10 (46mm) | OnePlus Watch 3 |
|---|---|---|
| Display size | 2.04 "lead | 1.5 " |
| Always-on display | true | true |
| Peak brightnessⓘ | 2000 nits | 2200 nitslead |
Health & Fitness
| Spec | Apple - Watch Series 10 (46mm) | OnePlus Watch 3 |
|---|---|---|
| ECG | true | true |
| SpO2 | true | true |
| Temperature sensor | true | true |
| Sleep tracking | true | true |
| Blood pressure | false | false |
Battery & Connectivity
| Spec | Apple - Watch Series 10 (46mm) | OnePlus Watch 3 |
|---|---|---|
| Battery life | 18 h | 120 hlead |
| GPS | true | true |
| Cellular | truelead | false |
| NFC | true | true |
| OS | watchOS | WearOSlead |
Frequently asked
Which has longer battery life, Watch Series 10 (46mm) or OnePlus Watch 3?+
OnePlus Watch 3 lasts 120 hours vs 18 hours.
Do Watch Series 10 (46mm) or OnePlus Watch 3 support ECG?+
Both support ECG.
Which has cellular, Watch Series 10 (46mm) or OnePlus Watch 3?+
Watch Series 10 (46mm) offers a cellular variant; OnePlus Watch 3 is Wi-Fi only.
Spec-level deep dives
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