Algoriddim's DJ app, Djay has finally accomplished the insurmountable--making it possible to DJ from a smartwatch and to cool look while doing it. Djay introduced Apple Watch integration to its iOS app practically as soon as Apple Watch was released. The thought of DJing on a watch face sounds impractical, but as an auxiliary tool in a skilled DJ's arsenal, it's just another way to manipulate sound. In the video below, you can see a DJ control his set from Apple Watch. Like a cowbell mounted on a drum kit, it looks cool, but overuse can lead to an obnoxious set.