vs
2.1Display5.1
Why is U2 better than Rainbow One Smartwatch?
U2 has no measurable advantages in this pair.
Why is Rainbow One Smartwatch better than U2?
- Built-in GPSNo · U2: Yes
- AMOLED / OLED displayNo · U2: Yes
- NFC paymentsNo · U2: Yes
- Screen size1.26″ vs 1.3″+3%
- Resolution (width)240 px vs 360 px+50%
Specifications
Side by side
| Design & durability | ||
| Case size | — | 43 mm |
| Strap material | — | Silikon |
| Ingress protection | IP68 | — |
| Water resistance (IPx) | IPx8 | — |
| Colours | Black, Silver, Pink | Gold |
| Display | ||
| Screen size | 1.26″ | 1.3″ |
| Display technology | LCD | AMOLED |
| Panel | TFT | AMOLED |
| AMOLED / OLED display | No | Yes |
| Touchscreen | — | Yes |
| Resolution (width) | 240 px | 360 px |
| Resolution (height) | 240 px | 360 px |
| Pixel density | 269 ppi | — |
| Refresh rate | 60 Hz | — |
| Battery | ||
| Battery capacity | 220 mAh | — |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | — | Yes |
| Sensors | Accelerometer, heart rate | SpO2 |
| Sports & navigation | ||
| Built-in GPS | No | Yes |
| Satellite systems | — | GPS |
| Connectivity | ||
| NFC payments | No | Yes |
| LTE (cellular) | No | — |
| eSIM | No | — |
| Wi-Fi | — | Wi-Fi 1 |
| Bluetooth | 5.4 | 5 |
| Smart features | ||
| Speaker | Yes | — |
| Platform | ||
| Operating system | Proprietary OS | — |
| Platform | Proprietary | — |
| Works with | — | Android |
