I was so excited to find this app, since my daughter with special needs turns everything to full volume. I paid for the pro version, despite the fact that she could still turn it up full blast before the volume control kicked in. It has to be purchased for multiple devices, which seems unfair, but I did it anyway. Now it doesn’t work at all. It resets constantly even though it’s set to 25%. Every hour or so, I have to close it out, go back in, reset it with the passcode, and hope for the best. I wish there was a way to “set it and forget it” so I didn’t have to keep doing it manually. I’ve paid $10 for this app on two devices and still am not happy with this its delivery.