The developer of "iDOS 2," a popular DOS emulator for iOS, on Thursday said Apple will remove the app from the App Store for breaking review guidelines. Available since 2014, iDOS 2 emulates the DOS system on iOS, allowing users to play classic games and use other DOS applications like word processors. The app comes complete with a PC keyboard, gamepad, and mouse, each of which can be operated by Bluetooth accessories. While updates have been relatively consistent, Apple is threatening to pull iDOS 2 from the App Store for running afoul of the company's guidelines. As detailed in a blog post from developer Chaoji Li, Apple in a letter said the app does not comply with App Store Review guideline 2.5.2, which restricts apps from installing or running executable code.