App connected dash cams have been getting better every year. The latest models have higher resolution and tighter smartphone integration. Take the VIOFO A229 Duo Dashcam for instance: It has 1440P30fps front and rear recording capability. With 2K front and rear cameras, you will be able to capture every event on the road, even the license plate numbers when rear ended.
The A229 Duo has STARVIS IMX335 5MP sensors with a f1.6 aperture lens. It supports 5GHz WiFi connectivity. With the companion app, you can see a live view from the front/rear camera. The device has a built-in GPS logger to track speed and routes. It has 3 parking modes (auto event detection, time lapse recording, lowbit recording). Optional accessories such as an external microphone and circular polarizing lens are available for this dash cam.[HT]