But the main limitation of the iOS simulator is that it does not mimic hardware. Both create an OS environment on your PC.
Though, both functions are almost the same. Sometimes it creates confusion for users. When you search about emulators, you may find another similar name of iOS simulators. Basically, it adopts virtualization technology. So you can run iPhone apps on your Windows or Mac. After installing an emulator on your computer, it creates an iOS environment on your computer or laptop.
The emulator is a virtual program that creates a different environment on the operating system.