vs
5.3Display8.5
4.9Health tracking9.1
Dimensions
Size comparison
Forerunner 70Pro 4 Air
| Forerunner 70 | Pro 4 Air | Difference | |
|---|---|---|---|
| Case size | 42.6 mm | 47 mm | −4.4 mm |
| Thickness | 11.9 mm | 9.9 mm | +2 mm |
Drawn to the same scale from the official dimensions (front and side).
Why is Forerunner 70 better than Pro 4 Air?
- Battery life (smartwatch mode)13 days vs 5 days2.6×
Why is Pro 4 Air better than Forerunner 70?
- Screen size1.2″ vs 1.56″+30%
- Resolution (width)390 px vs 480 px+23%
- Thickness11.9 mm vs 9.9 mm+20%
Specifications
Side by side
| Design & durability | ||
| Case size | 43 mm | 47 mm |
| Weight | 40 g | — |
| Thickness | 11.9 mm | 9.9 mm |
| Height | 42.6 mm | — |
| Width | 42.6 mm | — |
| Case material | Plastic / polymer | Stainless steel |
| Sapphire crystal | No | — |
| Lens / cover glass | chemically strengthened glass | — |
| Strap material | silicone | — |
| Water resistance | 5 ATM | — |
| Water rating (maker) | 5 ATM | — |
| Display | ||
| Screen size | 1.2″ | 1.56″ |
| Display technology | AMOLED | AMOLED |
| Panel | AMOLED | AMOLED |
| AMOLED / OLED display | Yes | Yes |
| Always-on display | Yes | Yes |
| Touchscreen | Yes | — |
| Resolution (width) | 390 px | 480 px |
| Resolution (height) | 390 px | 480 px |
| Pixel density | 325 ppi | — |
| Battery | ||
| Battery life (smartwatch mode) | 13 days | 5 days |
| Battery life with always-on display | 5 days | — |
| Battery saver mode | 28 days | — |
| GPS battery life | 23 h | — |
| Battery capacity | — | 440 mAh |
| 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 |
| Skin temperature | — | Yes |
| HRV tracking | Yes | Yes |
| Sleep tracking | Yes | Yes |
| Sensors | GPS, GLONASS, Galileo, Elevate wrist heart rate monitor, Pulse Ox blood oxygen saturation monitor, Accelerometer, Ambient light sensor | heart rate, SpO2 |
| Sports & navigation | ||
| Built-in GPS | Yes | — |
| Satellite systems | GLONASS, GALILEO | — |
| Sport profiles | 76 | — |
| Connectivity | ||
| Bluetooth | — | 5.1 |
| ANT+ sensors | Yes | — |
| Smart features | ||
| Storage | 0 GB | — |
| Third-party apps | Yes | — |
| Platform | ||
| Operating system | Garmin OS | — |
| Platform | Proprietary | — |
| Works with | iOS, Android | iOS, Android |
| Chipset | — | Jieli AC7013A |
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