Why can't I install APK files directly on my iPhone? Android and iOS are two major mobile operating systems. APK files are technically meant for mobile devices using Andriod. In contrast, iOS devices like iPhones or iPads have a separate file format called IPA (iOS App Store Package).

Installing an APK on an iOS device is impossible as both platforms are incompatible. But if you are keen to install APK on iPhone, you can go for either of the options: use jailbreaking process or an APK version of the file, which is specially designed for iOS.