With a virtual machine, you can use a completely different operating system and run applications in that OS.
Virtual machines are widely used on desktops. But if you want to run a virtual operating system on your iPhone X, there is no really good way but UTM.
The latter is an open-source virtual machine that allows you to run a fully functional Windows 10 operating system on your Apple phone.
According to the creators, UTM is an application that runs Windows and Linux operating systems on your iPhone or iPad. Plus, the speeds are quite acceptable. Some users try to run Windows 10 on an iPhone X with UTM. And it worked well.
For virtual machines running on mobile hardware, this app works well and doesn’t make you feel like an emulator. Although the developers did a great job, the performance was still slow and it took more than 30 seconds to open applications such as File Explorer or Settings.