vs
5.3Display2.1
Dimensions
Size comparison
Forerunner 165Flex Smart
| Forerunner 165 | Flex Smart | Difference | |
|---|---|---|---|
| Case size | 43 mm | 44 mm | −1 mm |
Drawn to the same scale from the official dimensions (front and side).
Why is Forerunner 165 better than Flex Smart?
- AMOLED / OLED displayYes · Flex Smart: No
- Screen size1.2″ vs 1.1″+9%
Why is Flex Smart better than Forerunner 165?
Flex Smart has no measurable advantages in this pair.
Specifications
Side by side
| Design & durability | ||
| Case size | 43 mm | 44 mm |
| Weight | 39 g | — |
| Thickness | 11.6 mm | — |
| Height | 43 mm | — |
| Width | 43 mm | — |
| Case material | Plastic / polymer | — |
| Sapphire crystal | No | — |
| Lens / cover glass | chemically strengthened glass | — |
| Strap material | silicone | Silikon, Edelstahl |
| Water resistance | 5 ATM | — |
| Water rating (maker) | 5 ATM | — |
| Colours | — | Silver, Red |
| Display | ||
| Screen size | 1.2″ | 1.1″ |
| Display technology | AMOLED | LCD |
| Panel | AMOLED | LCD |
| AMOLED / OLED display | Yes | No |
| Always-on display | Yes | — |
| Touchscreen | Yes | — |
| Resolution (width) | 390 px | — |
| Resolution (height) | 390 px | — |
| Pixel density | 325 ppi | — |
| Battery | ||
| Battery life (smartwatch mode) | 11 days | — |
| Battery saver mode | 20 days | — |
| GPS battery life | 19 h | — |
| Battery capacity | — | 150 mAh |
| Battery type | Lithium ion | — |
| Wireless charging | No | — |
| Charging | Garmin proprietary plug charger | — |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | — |
| Temperature sensor | Yes | — |
| HRV tracking | Yes | — |
| Sleep tracking | Yes | — |
| Sensors | GPS, GLONASS, Galileo, Elevate wrist heart rate monitor, Pulse Ox blood oxygen saturation monitor, Barometric altimeter, Compass, Accelerometer, Thermometer, Ambient light sensor | — |
| Sports & navigation | ||
| Built-in GPS | Yes | — |
| Satellite systems | GLONASS, GALILEO | — |
| Barometric altimeter | Yes | — |
| Compass | Yes | — |
| Sport profiles | 25 | — |
| LED flashlight | — | Yes |
| Connectivity | ||
| NFC payments | Yes | — |
| Bluetooth | — | 2 |
| ANT+ sensors | Yes | — |
| Smart features | ||
| Storage | 4 GB | — |
| Third-party apps | Yes | — |
| Platform | ||
| Operating system | Garmin OS | — |
| Platform | Proprietary | — |
| Works with | iOS, Android | iOS, Android |
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