iOS is considered to be the most secure operating system because of the controls Apple has over the applications to avoid malware. IOS emulators for Windows help run iPhone applications on Windows by making the system behave as an iOS system. With the help of an emulator, iPhone applications can be installed and run on Windows. Another type of emulators replicates the functionalities of a system. One type of emulators only replicates the behavior of a system. Instead of having to install a whole different operating system just for some of its peculiarities, the user can save time and memory and do the same with emulators. Emulators are necessary for users who have an operating system to work with, but need some functionalities that another operating system has. Usually, the user decides what system it should be that an operating system should behave like. An emulator is a tool or software that allows a system to replicate the behavior or functionalities of another system.