One of our users, Kayle Hinkle, has created an app for those of you who use Windows Phone 8.1. It has a few limitations but I imagine Kayle is going to keep adding functionality with future releases.
The app will download your existing verses when you first login and will synchronize your progress with Memverse. At the moment it doesn't automatically synchronize new verses that you add/delete on the main website.
This is a great tool for those of you who want to memorize on the go!
Try it out and give us feedback.