Launch Buttons developer Alexander Nowak released Kontrol for Traktor late last year. This simple kontrol surface for Native Instruments Traktor has been updated now to include support for Apple Watch. The app is free, but requires a $3 IAP to unlock.

Kontrol for Traktor iTunes Description:

THIS APP IS A WIRELESS MIDI CONTROLLER. IT DOES NOT PLAY AUDIO ON THE PHONE OR ON YOUR APPLE WATCH!

- FIRST APPLE WATCH APP THAT LETS YOU CONTROL TRAKTOR AND VIRTUAL DJ
- FIRST MIDI DJ CONTROL APP WITH A REVOLUTIONARY TOUCHSTRIP
- LOW LATENCY WIFI MIDI COMMUNICATION WITH TRAKTOR, SERATO, VIRTUAL DJ, MIXED IN KEY, ...
- 4 DECKS, HOT CUES, EQ's, FILTERS, FX CONTROLS, LOOP CONTROLS, CUE, SYNC, REMIX DECKS ...

Kontrol is a MIDI controller designed to control Traktor and other DJ applications in the most efficient way: instead of 2 bulky jog wheels you get 1 slim touch strip which gives room for more functions right at your fingertips. More special features like Remix Deck controls or the Browser are just one click away!

You can now also use Kontrol on your Apple Watch to control Deck A and B's FX, loop controls, hotcues and the crossfader. You can also move 1-8 bars back and forth via your Apple Watch.

Learn how to connect at bassapps.de/konnect.php

The demo is nice, but still hasn't convinced me that there is any value (or purpose) in getting an Apple Watch.