In this webinar I'll demonstrates how you can create the first SharePoint 2013 APP using Visual Studio 2012/2013. The demo includes how to register for Office 365 trial, managing SharePoint Online Site collections, describing the new App model , Choosing the right API, Packaging & Publishing the Apps.
Don't miss this great learning and networking opportunity! , for more info https://spuae-public.sharepoint.com/Blog/Post/30/Building-Your-First-App-for-SharePoint-2013