So, you should have a good system with at least 4GB RAM.
It is also worth to mention that emulators need enough RAM to properly work. For example, the iOS app may use Touch ID but a laptop with no fingerprint sensor cannot provide that.
So, few apps or features that are dependent on specific hardware may not work as it is. Here it is worth to note that simulators only create a virtual environment of software, but there is not the same hardware. The iOS emulators create an iOS virtual environment on your Windows PC to run iOS apps. Emulators are the programs that create a virtual OS on your system to run a specific program. Before I discuss the best iOS emulators, let me give you an overview of the emulator.