Corona SDK is a rapid game/ app development tool using which you can deploy to multiple mobile platforms. Corona SDK is built upon the physics engine. This tool uses the programming language called Lua throughout your app development process which is considered be an easier language as compared to the Objective C in Apple’s SDK and Java in Android SDK. It seems similar to the Action script in Flash. It does cost you a lot though leaving out the trial version which only lets you only to try Corona SDK without deploying to any platform. Today, You can just download the SDK from their Website and follow my little explained video tutorial below. Feel free to ask me as many questions as you want.