vs
2.9Display3.4
2.2Battery life3.5
4.9Health tracking2.1
2.8Sports & outdoor2.2
2.8Build & durability8.0
Dimensions
Size comparison
Forerunner 745Grit X
| Forerunner 745 | Grit X | Difference | |
|---|---|---|---|
| Height | 43.8 mm | 47 mm | −3.2 mm |
| Width | 43.8 mm | 47 mm | −3.2 mm |
| Thickness | 13.3 mm | 13 mm | +0.3 mm |
| Weight | 47 g | 64 g | −17 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Forerunner 745 better than Grit X?
- Battery life (smartwatch mode)7 days vs 6 days+17%
- Weight47 g vs 64 g+36%
Why is Grit X better than Forerunner 745?
- GPS battery life16 h vs 35 h2.2×
- Water resistance5 ATM vs 10 ATM2×
- Thickness13.3 mm vs 13 mm+2%
Specifications
Side by side
| Design & durability | ||
| Case size | 44 mm | 47 mm |
| Weight | 47 g | 64 g |
| Thickness | 13.3 mm | 13 mm |
| Height | 43.8 mm | 47 mm |
| Width | 43.8 mm | 47 mm |
| Case material | Plastic / polymer | Stainless steel |
| Sapphire crystal | No | — |
| Lens / cover glass | Corning® Gorilla® Glass DX | — |
| Strap material | silicone | — |
| Water resistance | 5 ATM | 10 ATM |
| Water rating (maker) | 5 ATM | WR100 |
| Military-grade (MIL-STD-810) | — | Yes |
| Colours | — | White & Silver, Green & Silver, Green & Black, Black & Black |
| Display | ||
| Screen size | 1.2″ | 1.2″ |
| Display technology | Memory-in-pixel (transflective) | Memory-in-pixel (transflective) |
| Panel | Sunlight-visible, transflective memory-in-pixel | MIP |
| AMOLED / OLED display | No | No |
| Always-on display | Yes | Yes |
| Touchscreen | — | Yes |
| Resolution (width) | 240 px | 240 px |
| Resolution (height) | 240 px | 240 px |
| Pixel density | 200 ppi | 200 ppi |
| Battery | ||
| Battery life (smartwatch mode) | 7 days | 6 days |
| GPS battery life | 16 h | 35 h |
| Battery capacity | — | 345 mAh |
| Battery type | — | Li-Pol |
| Wireless charging | No | — |
| Charging | Garmin proprietary plug charger | — |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | — |
| Skin temperature | — | No |
| Temperature sensor | Yes | — |
| HRV tracking | Yes | Yes |
| Sleep tracking | Yes | Yes |
| Sensors | GPS, GLONASS, Galileo, Elevate wrist heart rate monitor, Pulse Ox blood oxygen saturation monitor, Barometric altimeter, Compass, Gyroscope, Accelerometer, Thermometer | Barometer, Magnetometer compass, Accelerometer, Gyroscope |
| Sports & navigation | ||
| Built-in GPS | Yes | Yes |
| Satellite systems | GLONASS, GALILEO | — |
| Offline maps | — | No |
| Barometric altimeter | Yes | Yes |
| Compass | Yes | Yes |
| Multisport / triathlon mode | Yes | — |
| Sport profiles | 30 | — |
| LED flashlight | — | No |
| Connectivity | ||
| NFC payments | Yes | — |
| Wi-Fi | Wi-Fi 4 | — |
| ANT+ sensors | Yes | — |
| Smart features | ||
| Music on the watch | Yes | — |
| Storage | 4 GB | — |
| Third-party apps | Yes | — |
| Platform | ||
| Operating system | Garmin OS | Polar OS |
| Platform | Proprietary | Proprietary |
| Works with | iOS, Android | — |
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