Not all the applications can be available on rollApp right away. There can be different reasons for that. Most often they include technical limitations and licensing restrictions. We use Wishlist to gauge interest to different applications, which are not yet available on rollApp.
When you see an appication marked as “In Wishlist”, it means that someone has already asked for the application to be available on rollApp. Vote for this application to show that you would like to use it online too.