I like your app, so that I use it regularly in trains, etc...

In fact, I like it so much that I sometimes use it at home. But, sure, when you have a computer at home, you may want to view the art pieces on its bigger screen, and there is the website. On the other hand, you lose the ability to add art to your app favourites list by doing so. This is why I think that an phone-app-to-website-account synchronization would be great !