Why is U2 better than Watch S5?
U2 has no measurable advantages in this pair.
Why is Watch S5 better than U2?
- Built-in GPSNo · U2: Yes
- AMOLED / OLED displayNo · U2: Yes
- NFC paymentsNo · U2: Yes
- LTE (cellular)No · U2: Yes
- Battery capacity220 mAh vs 815 mAh3.7×
- Resolution (width)240 px vs 480 px2×
- eSIMNo · U2: Yes
- Screen size1.26″ vs 1.48″+17%
Specifications
Side by side
| Design & durability | ||
| Case size | — | 46 mm |
| Weight | — | 46 g |
| Thickness | — | 11 mm |
| Case material | — | Stainless steel |
| Lens / cover glass | — | Mineralglas |
| Strap material | — | Fluorelastomer |
| Water resistance | — | 5 ATM |
| Ingress protection | IP68 | — |
| Water resistance (IPx) | IPx8 | — |
| Water rating (maker) | — | 50 m / 5 bar / 5 ATM |
| Colours | Black, Silver, Pink | — |
| Display | ||
| Screen size | 1.26″ | 1.48″ |
| Display technology | LCD | AMOLED |
| Panel | TFT | AMOLED |
| AMOLED / OLED display | No | Yes |
| Touchscreen | — | Yes |
| Resolution (width) | 240 px | 480 px |
| Resolution (height) | 240 px | 480 px |
| Pixel density | 269 ppi | — |
| Refresh rate | 60 Hz | — |
| Battery | ||
| Battery life (smartwatch mode) | — | 21 days |
| Battery capacity | 220 mAh | 815 mAh |
| Battery type | — | Li-Po |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | — | Yes |
| Skin temperature | — | Yes |
| Sleep tracking | — | Yes |
| Sensors | Accelerometer, heart rate | heart rate, SpO2, barometer, accelerometer, ambient light |
| Sports & navigation | ||
| Built-in GPS | No | Yes |
| Satellite systems | — | GPS, GLONASS, GALILEO, BDS, QZSS |
| Barometric altimeter | — | Yes |
| Compass | — | Yes |
| Connectivity | ||
| NFC payments | No | Yes |
| LTE (cellular) | No | Yes |
| eSIM | No | Yes |
| Bluetooth | 5.4 | 5.4 |
| Smart features | ||
| Calls from the wrist | — | Yes |
| Speaker | Yes | Yes |
| Microphone | — | Yes |
| Platform | ||
| Operating system | Proprietary OS | HyperOS 3 |
| Platform | Proprietary | Proprietary |
| Works with | — | iOS, Android |
