There is no official, functional "Aptoide" application for iOS in the same way there is for Android. While Aptoide is a major alternative app store for Android, the iOS version usually refers to a web-based "wrapper" or a specific IPA (iOS App Store Package) file that users attempt to side-load.
third-party marketplace on an iPhone or iPad, providing access to apps not found in the official Apple App Store. How to Install the Aptoide IPA aptoide ios ipa patched