vs
2.9Display2.4
2.4Battery life3.8
3.7Build & durability3.8
Dimensions
Size comparison
Forerunner 245Forerunner 55
| Forerunner 245 | Forerunner 55 | Difference | |
|---|---|---|---|
| Height | 42.3 mm | 42 mm | +0.3 mm |
| Width | 42.3 mm | 42 mm | +0.3 mm |
| Thickness | 12.2 mm | 11.6 mm | +0.6 mm |
| Weight | 38 g | 37 g | +2 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Forerunner 245 better than Forerunner 55?
- GPS battery life24 h vs 20 h+20%
- Storage4 GB vs 0.03 GB133.3×
- Screen size1.2″ vs 1.04″+15%
- Resolution (width)240 px vs 208 px+15%
- Sport profiles16 vs 15+7%
Why is Forerunner 55 better than Forerunner 245?
- Battery life (smartwatch mode)7 days vs 14 days2×
- Weight38.5 g vs 37 g+4%
- Thickness12.2 mm vs 11.6 mm+5%
Specifications
Side by side
| Design & durability | ||
| Case size | 42 mm | 42 mm |
| Weight | 38.5 g | 37 g |
| Thickness | 12.2 mm | 11.6 mm |
| Height | 42.3 mm | 42 mm |
| Width | 42.3 mm | 42 mm |
| Case material | Plastic / polymer | — |
| Sapphire crystal | No | No |
| Lens / cover glass | Corning® Gorilla® Glass 3 | chemically strengthened glass |
| Strap material | silicone | silicone |
| Water resistance | 5 ATM | 5 ATM |
| Water rating (maker) | 5 ATM | 5 ATM |
| Display | ||
| Screen size | 1.2″ | 1.04″ |
| 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) | 240 px | 208 px |
| Resolution (height) | 240 px | 208 px |
| Pixel density | 200 ppi | 200 ppi |
| Battery | ||
| Battery life (smartwatch mode) | 7 days | 14 days |
| GPS battery life | 24 h | 20 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 | — |
| Sleep tracking | Yes | Yes |
| Sensors | GPS, GLONASS, Galileo, Elevate wrist heart rate monitor, Pulse Ox blood oxygen saturation monitor, Compass, Accelerometer, Thermometer | GPS, GLONASS, Galileo, Elevate wrist heart rate monitor, Accelerometer |
| Sports & navigation | ||
| Built-in GPS | Yes | Yes |
| Satellite systems | GLONASS, GALILEO | GLONASS, GALILEO |
| Compass | Yes | — |
| Sport profiles | 16 | 15 |
| Connectivity | ||
| ANT+ sensors | Yes | Yes |
| Smart features | ||
| Storage | 4 GB | 0.03 GB |
| Third-party apps | Yes | Yes |
| Platform | ||
| Operating system | Garmin OS | Garmin OS |
| Platform | Proprietary | Proprietary |
| Works with | iOS, Android | iOS, Android |
