vs
2.4Display2.9
3.8Battery life5.3
3.7Build & durability2.6
Dimensions
Size comparison
Forerunner 55Forerunner 945
| Forerunner 55 | Forerunner 945 | Difference | |
|---|---|---|---|
| Height | 42 mm | 47 mm | −5 mm |
| Width | 42 mm | 47 mm | −5 mm |
| Thickness | 11.6 mm | 13.7 mm | −2.1 mm |
| Weight | 37 g | 50 g | −13 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Forerunner 55 better than Forerunner 945?
- Weight37 g vs 50 g+35%
- Thickness11.6 mm vs 13.7 mm+18%
Why is Forerunner 945 better than Forerunner 55?
- GPS battery life20 h vs 36 h+80%
- Storage0.03 GB vs 16 GB533.3×
- Sport profiles15 vs 312.1×
- Screen size1.04″ vs 1.2″+15%
- Resolution (width)208 px vs 240 px+15%
Specifications
Side by side
| Design & durability | ||
| Case size | 42 mm | 47 mm |
| Weight | 37 g | 50 g |
| Thickness | 11.6 mm | 13.7 mm |
| Height | 42 mm | 47 mm |
| Width | 42 mm | 47 mm |
| Case material | — | Plastic / polymer |
| Sapphire crystal | No | No |
| Lens / cover glass | chemically strengthened glass | Corning® Gorilla® Glass 3 DX |
| Strap material | silicone | silicone |
| Water resistance | 5 ATM | 5 ATM |
| Water rating (maker) | 5 ATM | 5 ATM |
| Display | ||
| Screen size | 1.04″ | 1.2″ |
| Display technology | Memory-in-pixel (transflective) | Memory-in-pixel (transflective) |
| Panel | Sunlight-visible, transflective memory-in-pixel | Sunlight-visible, transflective memory-in-pixel |
| AMOLED / OLED display | No | No |
| Always-on display | Yes | Yes |
| Resolution (width) | 208 px | 240 px |
| Resolution (height) | 208 px | 240 px |
| Pixel density | 200 ppi | 200 ppi |
| Battery | ||
| Battery life (smartwatch mode) | 14 days | 14 days |
| GPS battery life | 20 h | 36 h |
| Wireless charging | No | No |
| Charging | Garmin proprietary plug charger | Garmin proprietary plug charger |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | — | Yes |
| Temperature sensor | — | Yes |
| HRV tracking | — | Yes |
| Sleep tracking | Yes | Yes |
| Sensors | GPS, GLONASS, Galileo, Elevate wrist heart rate monitor, Accelerometer | GPS, GLONASS, Galileo, Elevate wrist heart rate monitor, Pulse Ox blood oxygen saturation monitor, Barometric altimeter, Compass, Gyroscope, Accelerometer, Thermometer |
| Sports & navigation | ||
| Built-in GPS | Yes | Yes |
| Satellite systems | GLONASS, GALILEO | GLONASS, GALILEO |
| Offline maps | — | Yes |
| Barometric altimeter | — | Yes |
| Compass | — | Yes |
| Multisport / triathlon mode | — | Yes |
| Sport profiles | 15 | 31 |
| Connectivity | ||
| NFC payments | — | Yes |
| Wi-Fi | — | Wi-Fi 4 |
| ANT+ sensors | Yes | Yes |
| Smart features | ||
| Music on the watch | — | Yes |
| Storage | 0.03 GB | 16 GB |
| Third-party apps | Yes | Yes |
| Platform | ||
| Operating system | Garmin OS | Garmin OS |
| Platform | Proprietary | Proprietary |
| Works with | iOS, Android | iOS, Android |
