Nexar Turns Your iPhone Into a Dashcam
There are plenty of smart dash cameras available that let you capture all the action on the road. You can also use your smartphone as a dashcam. Nexar lets you use your smartphone to detect and record video on the road. This is a community-powered app, so you get warnings from other community members.
Nexar analyzes the road ahead of you and alerts you when people brake suddenly. It records dangerous road events, so you can have evidence when you are in an accident. By connecting drivers on the road, this cloud-based service aims to make roads safer. You can try the app for free.