vs
6.3Display5.4
2.7Battery life3.9
4.0Build & durability3.4
Dimensions
Size comparison
Approach J1Forerunner 70
| Approach J1 | Forerunner 70 | Difference | |
|---|---|---|---|
| Height | 43 mm | 42.6 mm | +0.4 mm |
| Width | 43 mm | 42.6 mm | +0.4 mm |
| Thickness | 11.4 mm | 11.9 mm | −0.5 mm |
| Weight | 29 g | 40 g | −11 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Approach J1 better than Forerunner 70?
- Storage4 GB vs 0 GB8×
- Weight29 g vs 40 g+38%
- Thickness11.4 mm vs 11.9 mm+4%
Why is Forerunner 70 better than Approach J1?
- Battery life (smartwatch mode)10 days vs 13 days+30%
- GPS battery life15 h vs 23 h+53%
- Sport profiles5 vs 7615.2×
Specifications
Side by side
| Design & durability | ||
| Case size | 43 mm | 43 mm |
| Weight | 29 g | 40 g |
| Thickness | 11.4 mm | 11.9 mm |
| Height | 43 mm | 42.6 mm |
| Width | 43 mm | 42.6 mm |
| Case material | Aluminium | Plastic / polymer |
| Sapphire crystal | No | No |
| Lens / cover glass | chemically strengthened glass | chemically strengthened glass |
| Strap material | elastic fabric hook and loop | silicone |
| Water resistance | 5 ATM | 5 ATM |
| Water rating (maker) | 5 ATM | 5 ATM |
| Display | ||
| Screen size | — | 1.2″ |
| Display technology | AMOLED | AMOLED |
| Panel | AMOLED | AMOLED |
| AMOLED / OLED display | Yes | Yes |
| Always-on display | Yes | Yes |
| Touchscreen | Yes | Yes |
| Resolution (width) | 390 px | 390 px |
| Resolution (height) | 390 px | 390 px |
| Pixel density | — | 325 ppi |
| Battery | ||
| Battery life (smartwatch mode) | 10 days | 13 days |
| Battery life with always-on display | — | 5 days |
| Battery saver mode | — | 28 days |
| GPS battery life | 15 h | 23 h |
| Battery type | Lithium ion | Lithium ion |
| Wireless charging | No | No |
| Charging | Garmin proprietary plug charger | Garmin proprietary plug charger |
| Health sensors | ||
| Optical heart rate | — | Yes |
| Blood oxygen (SpO2) | — | Yes |
| HRV tracking | — | Yes |
| Sleep tracking | — | Yes |
| Sensors | GPS, GLONASS, Galileo, Compass, Gyroscope, Accelerometer, Ambient light sensor | GPS, GLONASS, Galileo, Elevate wrist heart rate monitor, Pulse Ox blood oxygen saturation monitor, Accelerometer, Ambient light sensor |
| Sports & navigation | ||
| Built-in GPS | Yes | Yes |
| Satellite systems | GLONASS, GALILEO | GLONASS, GALILEO |
| Compass | Yes | — |
| Sport profiles | 5 | 76 |
| Connectivity | ||
| ANT+ sensors | — | Yes |
| Smart features | ||
| Storage | 4 GB | 0 GB |
| Third-party apps | — | Yes |
| Platform | ||
| Operating system | Garmin OS | Garmin OS |
| Platform | Proprietary | Proprietary |
| Works with | iOS, Android | iOS, Android |
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