vs
3.4Display3.5
5.4Battery life4.8
4.9Health tracking4.9
4.1Sports & outdoor5.0
4.9Build & durability2.7
Dimensions
Size comparison
Apex 2Forerunner 255
| Apex 2 | Forerunner 255 | Difference | |
|---|---|---|---|
| Height | 42.8 mm | 45.6 mm | −2.8 mm |
| Width | 43 mm | 45.6 mm | −2.6 mm |
| Thickness | 12.8 mm | 12.9 mm | −0.1 mm |
| Weight | 53 g | 49 g | +4 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Apex 2 better than Forerunner 255?
- GPS battery life40 h vs 30 h+33%
- Sapphire crystalYes · Forerunner 255: No
- Storage8 GB vs 4 GB2×
Why is Forerunner 255 better than Apex 2?
- Battery life (smartwatch mode)13 days vs 14 days+8%
- Screen size1.2″ vs 1.3″+8%
- Weight53 g vs 49 g+8%
- Sport profiles35 vs 58+66%
- Resolution (width)240 px vs 260 px+8%
Specifications
Side by side
| Design & durability | ||
| Case size | 43 mm | 46 mm |
| Weight | 53 g | 49 g |
| Thickness | 12.8 mm | 12.9 mm |
| Height | 42.8 mm | 45.6 mm |
| Width | 43 mm | 45.6 mm |
| Case material | Titanium | Plastic / polymer |
| Sapphire crystal | Yes | No |
| Lens / cover glass | Sapphire Glass | Corning® Gorilla® Glass 3 |
| Strap material | Silicone / Nylon | silicone |
| Water resistance | 5 ATM | 5 ATM |
| Water rating (maker) | 5 ATM | 5 ATM |
| Display | ||
| Screen size | 1.2″ | 1.3″ |
| Display technology | Memory-in-pixel (transflective) | Memory-in-pixel (transflective) |
| Panel | Touch Screen Always-On Memory LCD | Sunlight-visible, transflective memory-in-pixel |
| AMOLED / OLED display | No | No |
| Always-on display | Yes | Yes |
| Touchscreen | Yes | — |
| Resolution (width) | 240 px | 260 px |
| Resolution (height) | 240 px | 260 px |
| Pixel density | 200 ppi | 200 ppi |
| Battery | ||
| Battery life (smartwatch mode) | 13 days | 14 days |
| GPS battery life | 40 h | 30 h |
| GPS battery life (dual-band) | — | 16 h |
| Battery type | — | Lithium ion |
| Wireless charging | — | No |
| Charging | — | Garmin proprietary plug charger |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| ECG | Yes | — |
| Temperature sensor | Yes | Yes |
| HRV tracking | Yes | Yes |
| Sleep tracking | Yes | Yes |
| Sensors | Optical Heart Rate Monitor, Barometric Altimeter, Accelerometer, Gyroscope, 3D Compass, Thermometer ), Optical Pulse Oximeter, Electrical Heart Rate Sensor for HRV and Wellness Checks | 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 |
| Satellite systems | GLONASS, GALILEO, BDS, QZSS | GLONASS, GALILEO, BDS, QZSS |
| Offline maps | Yes | — |
| Barometric altimeter | Yes | Yes |
| Compass | Yes | Yes |
| Multisport / triathlon mode | Yes | Yes |
| Sport profiles | 35 | 58 |
| Connectivity | ||
| NFC payments | — | Yes |
| Wi-Fi | Wi-Fi 4 | — |
| ANT+ sensors | — | Yes |
| Smart features | ||
| Music on the watch | Yes | — |
| Storage | 8 GB | 4 GB |
| Third-party apps | — | Yes |
| Platform | ||
| Operating system | — | Garmin OS |
| Platform | Proprietary | Proprietary |
| Works with | — | iOS, Android |
