vs
2.7Battery life2.1
Dimensions
Size comparison
Approach S40Forerunner 45S
| Approach S40 | Forerunner 45S | Difference | |
|---|---|---|---|
| Height | 43.4 mm | 39.5 mm | +3.9 mm |
| Width | 43.4 mm | 39.5 mm | +3.9 mm |
| Thickness | 11.7 mm | 11.4 mm | +0.3 mm |
| Weight | 43 g | 32 g | +11 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Approach S40 better than Forerunner 45S?
- Battery life (smartwatch mode)10 days vs 7 days+43%
- GPS battery life15 h vs 13 h+15%
- Screen size1.2″ vs 1.04″+15%
- Resolution (width)240 px vs 208 px+15%
Why is Forerunner 45S better than Approach S40?
- Sport profiles2 vs 94.5×
- Weight43 g vs 32 g+34%
- Thickness11.7 mm vs 11.4 mm+3%
Specifications
Side by side
| Design & durability | ||
| Case size | 43 mm | 40 mm |
| Weight | 43 g | 32 g |
| Thickness | 11.7 mm | 11.4 mm |
| Height | 43.4 mm | 39.5 mm |
| Width | 43.4 mm | 39.5 mm |
| Sapphire crystal | No | No |
| Lens / cover glass | chemically strengthened glass | chemically strengthened glass |
| Strap material | silicone | silicone |
| Water resistance | — | 5 ATM |
| Water rating (maker) | — | 5 ATM |
| Display | ||
| Screen size | 1.2″ | 1.04″ |
| Display technology | — | Memory-in-pixel (transflective) |
| Panel | — | Sunlight-visible, transflective memory-in-pixel |
| AMOLED / OLED display | — | No |
| Always-on display | — | Yes |
| Resolution (width) | 240 px | 208 px |
| Resolution (height) | 240 px | 208 px |
| Pixel density | 200 ppi | 200 ppi |
| Battery | ||
| Battery life (smartwatch mode) | 10 days | 7 days |
| GPS battery life | 15 h | 13 h |
| Wireless charging | No | No |
| Charging | Garmin proprietary plug charger | Garmin proprietary plug charger |
| Health sensors | ||
| Optical heart rate | — | Yes |
| Sleep tracking | — | Yes |
| Sensors | GPS, Gyroscope, Accelerometer | GPS, GLONASS, Galileo, Elevate wrist heart rate monitor, Accelerometer |
| Sports & navigation | ||
| Built-in GPS | Yes | Yes |
| Satellite systems | — | GLONASS, GALILEO |
| Sport profiles | 2 | 9 |
| Smart features | ||
| Storage | 0.06 GB | — |
| Third-party apps | — | Yes |
| Platform | ||
| Operating system | Garmin OS | Garmin OS |
| Platform | Proprietary | Proprietary |
| Works with | iOS, Android | iOS, Android |
