# Samsung Galaxy Watch 7 (40mm) vs OnePlus Watch 3: specs and price compared

A sourced, side-by-side comparison of the Samsung Galaxy Watch 7 (40mm) (Samsung) and OnePlus Watch 3 (OnePlus) among smartwatches. Samsung Galaxy Watch 7 (40mm) is the cheaper of the two at $300.

## Side by side

| Spec | Samsung Galaxy Watch 7 (40mm) | OnePlus Watch 3 |
| --- | --- | --- |
| US price | $300 | $330 |
| 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 |

## Key differences

- 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) Yes vs OnePlus Watch 3 No
- 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) Yes vs OnePlus Watch 3 No
- Weight (g): Samsung Galaxy Watch 7 (40mm) 29 vs OnePlus Watch 3 50

## Sources

- Samsung Galaxy Watch 7 (40mm): https://en.wikipedia.org/wiki/Samsung_Galaxy_Watch_7 (en.wikipedia.org, verified 2026-06-15)
- OnePlus Watch 3: https://www.androidcentral.com/wearables/oneplus-watch-3-review (androidcentral.com, verified 2026-06-15)

Canonical: https://frontdeskreview.com/gear/smartwatches/samsung-galaxy-watch-7-40mm-vs-oneplus-watch-3/
Cite: Per The Front Desk Review, Samsung Galaxy Watch 7 (40mm) ($300) vs OnePlus Watch 3 ($330) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/smartwatches/samsung-galaxy-watch-7-40mm-vs-oneplus-watch-3/
License: CC BY 4.0.