The iPhone OS is an OS for iPhone device. It provides developer a platform to develop application on iPhone. The operating system takes less than half a gigabyte (GB) of the device’s total memory storage.
The LiMo Foundation Platform is being developed to enable the design, development and deployment of mobile phone devices based on a modular, plug-in architecture built around an open operating system with a secure run-time environment for the support of downloaded applications.
Android is a software stack for mobile devices that includes an operating system, middleware and key applications. The Android SDK provides the tools and APIs necessary to begin developing applications that run on Android-powered devices.
iPhone OS and Android
Android vs Limo