WeDJ for iPhone contains in-app purchases. Please check the pricing plan as below: FULL PACK-$14.99 ADVANCED AUTOMIX-$3.99 HOT CUE SYNC-$3.99 ECHO OUT MIX-$1.99 TRANSITION FX PACK-$9.99 ECHO SPIN MIX-$1.99 NOISE ECHO MIX-$1.99 NOISE ECHO CUT IN-$1.99 ECHO SPIN CUT IN-$1.99 ECHO OUT CUT IN-$1.99