The iDOS3 app allows iPhone users to emulate MS-DOS on their devices, enabling them to run classic DOS games and software. It provides touch screen game control and optimized performance for iOS devices5. However, the app has been rejected from the App Store by Apple, citing guidelines that only allow emulators of retro game consoles.
UTM SE is a general operating system emulator that can emulate various operating systems on an iPhone, including Windows 7, Windows 10, and several versions of Linux2. It allows users to run these operating systems natively and securely within an app on their iPhones.
UTM SE faces an extra barrier in reaching the iPhone because Apple is refusing to notarize the app for third-party App Stores due to the inclusion of just-in-time compilation, which technically breaks a guideline that apps must be self-contained.