This smart brush tells you if your hair is healthy The Kérastase Hair Coach is a hairbrush that connects to an app on your phone. Facebook Prev Article Next Article Gadgets Checkout these cool gadgets... Related Posts Christmas Sweater Turns Into a FirePlace with Smartphone This Is The Closest Gadget We Have to the StarTrek Communicator Portable Record Player from 1982 Google Goggles Makes The World More Googly iCapOpener Meanwhile in Beijing…Funny New Toy