No sound only vibrates – Gun Sounds on Shake Review

We tried different volume options, shake on/off, app vibration on/off, rebooting the phone and we don’t hear any sound. My phone was not in silent mode. Ringer volume was turned up all the way. I rebooted after install and that didn’t produce any sound. I disconnected any Bluetooth speakers and that didn’t work either. I would love to know how others are using this on an iPhone.
Review by Maejed on Gun Sounds on Shake.