vs
3.4Display2.2
5.4Battery life3.7
4.9Health tracking4.9
4.1Sports & outdoor5.0
4.9Build & durability3.5
Dimensions
Size comparison
Apex 2Forerunner 255S
| Apex 2 | Forerunner 255S | Difference | |
|---|---|---|---|
| Height | 42.8 mm | 41 mm | +1.8 mm |
| Width | 43 mm | 41 mm | +2 mm |
| Thickness | 12.8 mm | 12.4 mm | +0.4 mm |
| Weight | 53 g | 39 g | +14 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Apex 2 better than Forerunner 255S?
- GPS battery life40 h vs 26 h+54%
- Battery life (smartwatch mode)13 days vs 12 days+8%
- Sapphire crystalYes · Forerunner 255S: No
- Storage8 GB vs 4 GB2×
- Screen size1.2″ vs 1.1″+9%
- Resolution (width)240 px vs 218 px+10%
Why is Forerunner 255S better than Apex 2?
- Weight53 g vs 39 g+36%
- Sport profiles35 vs 58+66%
- Thickness12.8 mm vs 12.4 mm+3%
Specifications
Side by side
| Design & durability | ||
| Case size | 43 mm | 41 mm |
| Weight | 53 g | 39 g |
| Thickness | 12.8 mm | 12.4 mm |
| Height | 42.8 mm | 41 mm |
| Width | 43 mm | 41 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″ | 1.1″ |
| 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 | 218 px |
| Resolution (height) | 240 px | 218 px |
| Pixel density | 200 ppi | 198 ppi |
| Battery | ||
| Battery life (smartwatch mode) | 13 days | 12 days |
| GPS battery life | 40 h | 26 h |
| GPS battery life (dual-band) | — | 13 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 |
