Hexagon is a bike camera that turns your smartphone into a rearview mirror

How do you put rearview mirrors on a bike? It’s a tougher question than you’d think. The traditional solution of mounting them on the handlebars works for seeing to the sides of your bike, but unlike cars, there’s no ceiling to mount a mirror on for seeing directly behind you.
A startup called Smart Bike has an idea to solve this problem using a camera and a handlebar-mounted smartphone. Its first product, a camera called Hexagon, connects to a smartphone app and functions as a