An application called SynScan PTZ is available on App Store (for iOS devices) now. The Android version will be available about 3 months later.
SynScan PTZ can control a Skywatcher motorized mount (i.e. AZ-GTi, AZ-EQ5, AZ-EQ6, AllView and Star Discovery) to perform multiple photographic tasks, including panorama, time-lapse or multiple-points scan. The mount must have a shutter control port and should be equipped with a built-in Wi-Fi module or an external SynScan Wi-Fi dongle.