For what it's worth, I would subscribe for Pro features. I don't mind that.
I think one problem you might start having is that as you increase the feature set, the app is going to become very feature full. It's going to start becoming quite hard to get to grips with for new users.
I think one problem you might start having is that as you increase the feature set, the app is going to become very feature full. It's going to start becoming quite hard to get to grips with for new users.