You're looking for information on how to obtain or install ARK: Survival Mobile on an iOS device using an IPA file. Here's some general information:
An IPA file is a file format used to distribute and install applications on iOS devices, similar to how APK files are used on Android devices.
ARK: Survival Mobile is a mobile version of the popular survival game ARK: Survival Evolved, developed by Studio Wildcard. The mobile game allows players to survive on an island filled with dinosaurs and other prehistoric creatures.