Crystal is your Android companion for Sketch. You don't need any extra apps on your Mac, just install Crystal on your Android device and you can start mirroring designs instantly.
The Speed of Sound
Just open Crystal and Sketch on same WiFi network and you can get going. Preview your designs as fast as your WiFi can handle!
Plug & Play
When your WiFi starts acting up, you can fallback to USB. With the companion app, you can keep mirroring whatever the weather (or WiFi connection).