These are the days of mobile storytelling. Several Apps have come up recently. Here is a short list of nice tools:
The one I personally use most in the moment is Steller. Steller is a app which offers you the chance to create multimedia story with your Smartphone furthermore it is a quite vital storytelling Plattform particularly in the US.
Here are examples Stories I created with this App recently:
You are invited to follow me on steller @benjaminroeber.