6.6Display4.3
9.5Health tracking5.0
8.0Sports & outdoor8.0
7.6Smart features3.9
9.0Build & durability2.7
Dimensions
Size comparison
Watch SE 3X3
| Watch SE 3 | X3 | Difference | |
|---|---|---|---|
| Height | 44 mm | 53.8 mm | −9.8 mm |
| Width | 38 mm | 53.8 mm | −15.8 mm |
| Thickness | 10.7 mm | 13.5 mm | −2.8 mm |
| Weight | 26 g | 95 g | −68 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Watch SE 3 better than X3?
- Weight26.4 g vs 94.6 g3.6×
- AMOLED / OLED displayYes · X3: No
- NFC paymentsYes · X3: No
- LTE (cellular)Yes · X3: No
- eSIMYes · X3: No
- Screen size1.78″ vs 1.73″+3%
- Thickness10.7 mm vs 13.5 mm+26%
Why is X3 better than Watch SE 3?
- Resolution (width)368 px vs 466 px+27%
- Pixel density326 ppi vs 381 ppi+17%
Specifications
Side by side
| Design & durability | ||
| Case size | 44 mm | 54 mm |
| Weight | 26.4 g | 94.6 g |
| Thickness | 10.7 mm | 13.5 mm |
| Height | 44 mm | 53.8 mm |
| Width | 38 mm | 53.8 mm |
| Case material | Aluminium | — |
| Sapphire crystal | Yes | — |
| Lens / cover glass | Ion-X strengthened glass (2025 gen) | — |
| Strap material | Fluorelastomer | — |
| Water resistance | 5 ATM | 5 ATM |
| Colours | Midnight, Starlight | Black |
| Display | ||
| Screen size | 1.78″ | 1.73″ |
| Display technology | OLED | LCD |
| Panel | Retina LTPO OLED | TFT LCD |
| AMOLED / OLED display | Yes | No |
| Resolution (width) | 368 px | 466 px |
| Resolution (height) | 448 px | 466 px |
| Pixel density | 326 ppi | 381 ppi |
| Peak brightness | 1,000 nits | — |
| LTPO display | Yes | — |
| Refresh rate | 60 Hz | 60 Hz |
| Battery | ||
| Battery life (smartwatch mode) | 0.8 days | — |
| Battery life (hours) | 18 h | — |
| Battery capacity | — | 900 mAh |
| Battery type | Li-Ion | — |
| Wireless charging | Yes | — |
| Charged in 30 min | 53% | — |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | — | Yes |
| ECG | Yes | — |
| Skin temperature | Yes | — |
| Temperature sensor | Yes | — |
| Sleep tracking | Yes | — |
| Sensors | Accelerometer, gyro, heart rate (2nd gen), barometer, always-on altimeter, compass, temperature (body) | Accelerometer, heart rate, SpO2, barometer, compass |
| Sports & navigation | ||
| Built-in GPS | Yes | Yes |
| Satellite systems | GLONASS, GALILEO, QZSS | — |
| Barometric altimeter | Yes | Yes |
| Compass | Yes | Yes |
| Connectivity | ||
| NFC payments | Yes | No |
| LTE (cellular) | Yes | No |
| eSIM | Yes | No |
| Wi-Fi | Wi-Fi 4 | — |
| Bluetooth | 5.3 | 5.3 |
| Smart features | ||
| Calls from the wrist | Yes | — |
| Speaker | Yes | Yes |
| Microphone | Yes | — |
| Voice assistant | Yes | — |
| Music on the watch | Yes | — |
| Storage | 64 GB | — |
| Platform | ||
| Operating system | watchOS 26 | Proprietary OS |
| Platform | watchOS | Proprietary |
| Works with | iOS | — |
| Chipset | Apple S10 | — |
