Remote would vibrate (or ring) your iphone when getting near of a cue point

I dj on night clubs, with a Numark idj, and i would love to see an iphone remote controller to the ipad djay app, and the feature that would ring or vibrate my phone when the music gets to a pre-set cue point, or a timer set, for 10 seconds before the cue point. That way, i could relax, and talk to others, and when my phone vibrates, i get back to the table and make the “bridge” between the current song and the next one.

Thanks. @guialmachado