Friday Lock is the world’s smallest retrofit lock, and the only lock to offer Bluetooth, WiFi and HomeKit in one product. Built with the latest  security technologies, the lock is controlled by an app on the users phone. Designed in a groundbreaking collaboration with architectural group BIG – Bjarke Ingels Group – Friday Lock’s changeable die-cast metal shell comes in seven classic finishes including copper, bronze, gun metal, brass, silver, nickel satin and porcelain - to make any door look stylish.