Remote Controls of Macbook DJay with iPhone

Here’s an idea that would be nice to see. There are times when I have to leave my “rig” and do a remote location for announcements for example at a wedding reception, under a tent and the couple is at the opposite end from where my “rig” is. It would be nice if I could control my macbook djay software volume or advance the next track with my iphone being on the same wifi network or if my phone was tethered to my macbook if that’s even technically possible.