Best operating systems IOS (iOS) is the fluid works well, because everything has been put on the work itself. Specifically, the connection between different applications together.
The operating system OS (iOS) is a smooth flow of work as well. Because everything has been put to work perfectly. The connection between the application of different length together.
The operating system IOS (iOS) will flow in use as well. Because everything is put the system seamlessly. Especially the connection between various applications together.