Kontrol Traktor Controller is a free Android app that acts as a MIDI DJ Control interface emulation for Native Instruments Traktor, Serato, VirtualDJ, and more. It allows users to control Traktor and Virtual DJ with their Android device. The app offers mappings for both apps and is the first DJ control app with a revolutionary touchstrip.

The app uses low latency WiFi MIDI communication with Traktor, Serato, Virtual DJ, and VDJ. It has hot cues, EQ's, filters, FX controls, remix decks (beta), loop controls, cue, and sync. However, it is important to note that this app does not play audio on the phone.

Overall, Kontrol Traktor Controller is a useful and free app for DJs who want to control Traktor and Virtual DJ with their Android device.