Smartwatches / OnePlus
OnePlus Watch 3 43mm
Two and a half days of real Wear OS battery for $250 — but zero cleared health features.
Overall score 7.1/10
Pros
- + 60 hours of real Wear OS battery life — two and a half times a Galaxy Watch9
- + Stainless steel case at 37.8 g, lighter and better built than most sub-$300 rivals
- + Full Google Play Store, so you are not stuck in a proprietary app gallery
- + Frequently discounted to $199, which is remarkable for a Wear OS watch
Cons
- − No ECG and no FDA-cleared health feature at all — a $249 wellness tracker, not a heart-health device
- − Android only; the Amazon listing says so in the product title
- − No LTE variant sold in the US
- − OnePlus's own store price has drifted around ($270 at last check versus $249.99 on Amazon) — shop the ASIN, not the brand site
- − Peak display brightness is not published by OnePlus
OnePlus Watch 3 43mm review: what the specs say
Two and a half days of real Wear OS battery for $250 — but zero cleared health features. At $249.99, OnePlus's 2025 model sits among the cheapest we cover — the smartwatches we compare run from $79.99 to $799. It scores 7.1/10 overall, calculated from published specifications across 8 categories rather than from a subjective impression.
Its strongest showing is Value at 8.4/10 — what you get for the money once LTE upcharges and subscriptions are counted in. The weakest is Ecosystem Freedom at 3.0/10, which is the trade-off to weigh before buying: if that is the specification you care about most, one of the alternatives below will serve you better.
Worth knowing before you buy: no ECG and no FDA-cleared health feature at all — a $249 wellness tracker, not a heart-health device; and android only; the Amazon listing says so in the product title. Every specification on this page comes from OnePlus's own documentation or a verified retail listing — where a figure is not published, the table says so rather than estimating it.
Specifications and price last verified . Report an error
Full Specifications
| Phone Compatibility | Android only in practice. OnePlus markets it as a Wear OS watch requiring Android; the Amazon listing title states in plain text 'not Compatible with iOS'. Sources conflict: Smartprix's spec sheet lists 'Android 9.0+ and iOS', which contradicts both OnePlus and the retail listing — treat iOS as unsupported. |
| Claimed Battery Life | 60 hrs |
| What the Battery Claim Assumes | OnePlus's 60 h smart-mode figure assumes the low-power RTOS co-processor handling the always-on layer and no heavy GPS. Power Saver mode extends it further but drops Wear OS features; continuous GPS workouts and LTE-style always-connected use are not part of the claim. |
| Case Size | 43 mm |
| Display | 1.32-inch LTPO AMOLED, 466x466. Peak brightness is not published by OnePlus. |
| Operating System | Wear OS 5 by Google plus RTOS dual-engine |
| Third-Party Apps | Google Play Store on the watch — a full Wear OS catalogue, unusual at this price |
| Health Features Enabled in the US | Heart rate, SpO2, skin temperature, stress and sleep — all wellness-grade. There is NO ECG and no FDA-cleared feature of any kind on this model in the US; the health story is the weakest of any Wear OS watch here. |
| Subscription Wall | None. OHealth is free and does not paywall any metric. |
| LTE Option | No LTE variant is sold in the US — the OnePlus Watch 3 43mm is Bluetooth/Wi-Fi only. |
| Water & Dust Rating | 5 ATM (50 m) plus IP68 |
| Battery Replacement | OnePlus does not publish a consumer battery-replacement service for the Watch 3. |
| Connectivity | Bluetooth 5.2, Wi-Fi 2.4/5GHz, NFC, Multi-GNSS GPS |
| Material | Stainless steel case with fluoroelastomer strap |
| Warranty | 12 months |
Compare OnePlus Watch 3 43mm With
Cheaper Alternative
Amazfit Bip 6 (46mm) — $79.99
Premium Alternative
Mobvoi TicWatch Atlas — $349.99