Really, the top priority.
For me, I realPro is for musicians, playing music, not wanting the perfect melody.
Syncing, when you're playing with a group, is mandatory, every one knows what is the actual bar, knows the repeat, da segno and the final.
I can imagine a sync using bluetooth, one is master, the others are slaves.
I think that the accuracy of pad is enough to only trigger the start time, I am not looking for the 1/100 second accuracy, the drum or the bass leads the beat.
So please add this feature, even if you increase 20% the price of the app !
Thx