Corona SDK is a software development kit (SDK) developed by Corona Labs Inc. Corona SDK allows software programmers to build mobile applications for iOS, Android, and Kindle, desktop applications for Windows and OS X, and connected TV applications for Apple TV and Android TV. Corona uses integrated Lua layered on top of C++/OpenGL to build graphic applications. The software has two subscription tiers: the free Corona SDK and the paid Corona Enterprise. A Corona Enterprise subscription adds the ability to use native code in app development.