vs
2.4Display7.1
3.8Battery life4.5
3.7Build & durability4.3
Dimensions
Size comparison
Forerunner 55Run
| Forerunner 55 | Run | Difference | |
|---|---|---|---|
| Height | 42 mm | 46 mm | −4 mm |
| Width | 42 mm | 46 mm | −4 mm |
| Thickness | 11.6 mm | 11.5 mm | +0.1 mm |
| Weight | 37 g | 36 g | +1 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Forerunner 55 better than Run?
- Battery life (smartwatch mode)14 days vs 12 days+17%
Why is Run better than Forerunner 55?
- GPS battery life20 h vs 30 h+50%
- AMOLED / OLED displayNo · Forerunner 55: Yes
- Resolution (width)208 px vs 466 px2.2×
- Screen size1.04″ vs 1.32″+27%
- Sport profiles15 vs 322.1×
- Pixel density200 ppi vs 353 ppi+76%
- Weight37 g vs 36 g+3%
Specifications
Side by side
| Design & durability | ||
| Case size | 42 mm | 46 mm |
| Weight | 37 g | 36 g |
| Thickness | 11.6 mm | 11.5 mm |
| Height | 42 mm | 46 mm |
| Width | 42 mm | 46 mm |
| Case material | — | Stainless steel |
| Sapphire crystal | No | — |
| Lens / cover glass | chemically strengthened glass | Gorilla Glas |
| Strap material | silicone | Nylon textile |
| Water resistance | 5 ATM | 5 ATM |
| Water rating (maker) | 5 ATM | 50 m / 5 bar / 5 ATM |
| Display | ||
| Screen size | 1.04″ | 1.32″ |
| Display technology | Memory-in-pixel (transflective) | AMOLED |
| Panel | Sunlight-visible, transflective memory-in-pixel | AMOLED |
| AMOLED / OLED display | No | Yes |
| Always-on display | Yes | Yes |
| Touchscreen | — | Yes |
| Resolution (width) | 208 px | 466 px |
| Resolution (height) | 208 px | 466 px |
| Pixel density | 200 ppi | 353 ppi |
| Battery | ||
| Battery life (smartwatch mode) | 14 days | 12 days |
| GPS battery life | 20 h | 30 h |
| GPS battery life (dual-band) | — | 20 h |
| Battery type | — | rechargeable lithium-ion |
| Wireless charging | No | — |
| Charging | 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 | heart rate, SpO2, accelerometer |
| Sports & navigation | ||
| Built-in GPS | Yes | Yes |
| Dual-band GPS | — | Yes |
| Satellite systems | GLONASS, GALILEO | GPS |
| Barometric altimeter | — | Yes |
| Compass | — | Yes |
| Multisport / triathlon mode | — | Yes |
| Sport profiles | 15 | 32 |
| Connectivity | ||
| Wi-Fi | — | Wi-Fi 1 |
| Bluetooth | — | 5 |
| ANT+ sensors | Yes | — |
| Smart features | ||
| Storage | 0.03 GB | — |
| Third-party apps | Yes | — |
| Platform | ||
| Operating system | Garmin OS | Suunto OS |
| Platform | Proprietary | Proprietary |
| Works with | iOS, Android | iOS, Android |
