An introduction to Emotish, a free iPhone app, and how it was built with Parse, a free back end as a service, and my favorite way to rapidly prototype mobile apps.
free back end as a service ‣ SDKs for iOS, Android, JavaScript, and a REST API ‣ build your back end on the fly ‣ stay within Objective-C (if you want) ‣ easy push notifications and social network integration ‣ no worries about servers or scaling