Its a good idea, but an app like this shouldn't lock a whitelist behind a paywall. I've already read the responses from the devs on the other reviews so I understand why it is but that doesn't change my review. I listen to music and use flashcard apps/dictionary apps/art references and my gallery on my phone when doing what I needed this app for. It's useless if it lacks that basic functionality. Will not pay for something that should be included in the free version.