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 Jetovator – The Flying Water-Powered Bike Atacama’s Motorcycle Expedition Tent Koubachi Wi-Fi Sensor Keeping Your Plants Alive The Dream iPhone Case For The Bubble Wrap Obsessed Meet The Futuristic Boat That Can ‘Fly On Water’ Finally a Drone That Can Follow You