Don't get me wrong, I absolutely love the technique for learning they use. However!, Without premium you can only be on the app for 5 minutes a day. You cannot do ANYTHING after that 5 min. On top of that, they have the audacity to show me an ad after my 5 mins was up. Wouldn't be so bothersome if I was able to continue to use the app. I get keeping an app great costs money, but there are ways to allow free and premium to coexist without it ruining the entire experience of the app.