vs
3.5Display3.5
4.8Battery life4.8
4.9Health tracking4.9
5.0Sports & outdoor5.0
2.7Build & durability2.7
Dimensions
Size comparison
Forerunner 255Forerunner 255 Music
| Forerunner 255 | Forerunner 255 Music | Difference | |
|---|---|---|---|
| Height | 45.6 mm | 45.6 mm | = |
| Width | 45.6 mm | 45.6 mm | = |
| Thickness | 12.9 mm | 12.9 mm | = |
| Weight | 49 g | 49 g | = |
Drawn to the same scale from the official dimensions (front and side).
Why is Forerunner 255 better than Forerunner 255 Music?
Forerunner 255 has no measurable advantages in this pair.
Why is Forerunner 255 Music better than Forerunner 255?
Forerunner 255 Music has no measurable advantages in this pair.
Specifications
Side by side
| Design & durability | ||
| Case size | 46 mm | 46 mm |
| Weight | 49 g | 49 g |
| Thickness | 12.9 mm | 12.9 mm |
| Height | 45.6 mm | 45.6 mm |
| Width | 45.6 mm | 45.6 mm |
| Case material | Plastic / polymer | Plastic / polymer |
| Sapphire crystal | No | No |
| Lens / cover glass | Corning® Gorilla® Glass 3 | Corning® Gorilla® Glass 3 |
| Strap material | silicone | silicone |
| Water resistance | 5 ATM | 5 ATM |
| Water rating (maker) | 5 ATM | 5 ATM |
| Display | ||
| Screen size | 1.3″ | 1.3″ |
| 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) | 260 px | 260 px |
| Resolution (height) | 260 px | 260 px |
| Pixel density | 200 ppi | 200 ppi |
| Battery | ||
| Battery life (smartwatch mode) | 14 days | 14 days |
| GPS battery life | 30 h | 30 h |
| GPS battery life (dual-band) | 16 h | 16 h |
| Battery type | Lithium ion | Lithium ion |
| Wireless charging | No | No |
| Charging | Garmin proprietary plug charger | Garmin proprietary plug charger |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| Temperature sensor | Yes | Yes |
| HRV tracking | Yes | Yes |
| Sleep tracking | Yes | Yes |
| Sensors | GPS, GLONASS, Galileo, QZSS, BeiDou, SatIQ technology, Elevate wrist heart rate monitor, Pulse Ox blood oxygen saturation monitor, Barometric altimeter, Compass, Gyroscope, Accelerometer, Thermometer | GPS, GLONASS, Galileo, QZSS, BeiDou, SatIQ technology, Elevate wrist heart rate monitor, Pulse Ox blood oxygen saturation monitor, Barometric altimeter, Compass, Gyroscope, Accelerometer, Thermometer |
| Sports & navigation | ||
| Built-in GPS | Yes | Yes |
| Dual-band GPS | Yes | Yes |
| Satellite systems | GLONASS, GALILEO, BDS, QZSS | GLONASS, GALILEO, BDS, QZSS |
| Barometric altimeter | Yes | Yes |
| Compass | Yes | Yes |
| Multisport / triathlon mode | Yes | Yes |
| Sport profiles | 58 | 58 |
| Connectivity | ||
| NFC payments | Yes | Yes |
| Wi-Fi | — | Wi-Fi 4 |
| ANT+ sensors | Yes | Yes |
| Smart features | ||
| Music on the watch | — | Yes |
| Storage | 4 GB | 4 GB |
| Third-party apps | Yes | Yes |
| Platform | ||
| Operating system | Garmin OS | Garmin OS |
| Platform | Proprietary | Proprietary |
| Works with | iOS, Android | iOS, Android |
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