We do have an iPhone/iPad app version available. It does not have quite as many features but you can still produce good things with it. It's called VideoScribe Anywhere and you can collect a few coins in the tutorial to allow you a few free uploads before you need to complete any In-App purchases.
We also have VideoScribe Now as well which is a basic and completely free version available on Android and iOS.
For anyone reading this thread in July of 2018, I believe that the android app is no longer supported, and cannot connect to the login servers. In other words, you cannot use videoscribe for android at this time.
-Mike (videoscribe user)