Samsung
Samsung Galaxy Watch 7 (40mm)
$300Cheaper
Released 2024-07
Best Smartwatches · head-to-head
Samsung Galaxy Watch 7 (40mm) vs OnePlus Watch 3
A sourced, side-by-side comparison. Samsung Galaxy Watch 7 (40mm) is cheaper at $300. Every spec and price links to its source.
OnePlus
OnePlus Watch 3
$330
Released 2025-04
Which is better: the Samsung Galaxy Watch 7 (40mm) or OnePlus Watch 3?
The Samsung Galaxy Watch 7 (40mm) wins 1 of the 1 specs we compare head to head; the other wins 0. The Samsung Galaxy Watch 7 (40mm) is the cheaper at $300. The Samsung Galaxy Watch 7 (40mm) both leads on specs and costs less — the straightforward pick.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Samsung Galaxy Watch 7 (40mm) | OnePlus Watch 3 |
|---|---|---|
| US price | $300 MSRP, 40mm Wi-Fi | $330 MSRP, US launch price |
| Brand | Samsung | OnePlus |
| Released | 2024-07 | 2025-04 |
| Case size (mm) | 40 | 47 |
| Display type | AMOLED | LTPO AMOLED |
| Battery hr | 24 | 120 |
| Gps | Yes | Yes |
| Lte option | Yes | No |
| Water resistance (m) | 50 | 50 |
| OS | Wear OS 5 / One UI Watch 6 | Wear OS 5 |
| Ecg | Yes | No |
| Weight (g) | 29 | 50 |
| Release | 2024-07 | 2025-04 |
Sources — Samsung Galaxy Watch 7 (40mm): en.wikipedia.org (verified 2026-06-15). OnePlus Watch 3: androidcentral.com (verified 2026-06-15).
What's the difference between the Samsung Galaxy Watch 7 (40mm) and OnePlus Watch 3?
Where the two actually differ on the specs we track (7 of 9). Matching specs are omitted.
- Case size (mm): Samsung Galaxy Watch 7 (40mm) 40 vs OnePlus Watch 3 47
- Display type: Samsung Galaxy Watch 7 (40mm) AMOLED vs OnePlus Watch 3 LTPO AMOLED
- Battery hr: Samsung Galaxy Watch 7 (40mm) 24 vs OnePlus Watch 3 120
- Lte option: Samsung Galaxy Watch 7 (40mm) true vs OnePlus Watch 3 false
- OS: Samsung Galaxy Watch 7 (40mm) Wear OS 5 / One UI Watch 6 vs OnePlus Watch 3 Wear OS 5
- Ecg: Samsung Galaxy Watch 7 (40mm) true vs OnePlus Watch 3 false
- Weight (g): Samsung Galaxy Watch 7 (40mm) 29 vs OnePlus Watch 3 50