Please note: there is a crash bug in version 2.1.14 of Walkout Song DJ that only occurs with devices running iOS 8.4 or 8.3.
If you have one of these devices and have upgraded to version 2.1.14 of Walkout Song DJ, please upgrade the device to iOS 9.0 and the problem will go away.
I have submitted another version 2.1.15 to the app store that will also remedy the bug.