Instagram Pro is designed mostly for Android, and it can be difficult to use on iOS devices. On the contrary, you can easily install APK files using modified apps on Android by simply changing one setting to allow installation from unknown sources while IOS has stricter concepts for security and privacy which makes installing some tweaks extremely difficult. Due to the stringent rules of app distribution on Apple devices and their intrinsic security, it is challenging (read impossible) for third-party apps like Instagram Pro to get installed on a device without jailbreak. Note: According to a survey conducted by Statista, more than 80% of iPhone users steers clear of jailbreaking their devices, considering the security threats they might face and warranty and performance issues that may come up.
Jailbreaking is the process of removing software locks imposed by Apple on devices that were running iOS. But it can be dangerous because you have compromised your device and open up to malware, battery efficiency loss there is a possibility that the operating system will crash as well. Meanwhile, Forbes said in 2022 that the probability of a malware infection on jailbroken devices is some 50% higher than for non-jailbroken devices. Though the user wants to jailbreak their iPhone, most of these apps are for Android and finding a version that can be run on an iOS due this restrictly is still difficult.
The big reason for iOS missing out on all the Instagram Pro fun is Apple's tight security and app verification process. In comparison to Android where developers can distribute APK files on their own, iOS apps have the constraint of being reviewed by App Store. Apps that break Apple's rules (like modified code or unofficial features) get the boot. This is the reason why Instagram Pro not on App Store and less access to iOS.
Also, if any user installs Instagram Pro via sideloading (methods that use tools like Cydia Impactor or AltStore), there are stability problems. Media downloads and some privacy settings may not work properly in enabled apps. Tech communities like Reddit r/jailbreak have bugs and crashes with more than 60% of the users when using modified apps on their iOS device, which is showing how hard this is.
Instagram Pro is still best for Android users who prefer changes, proper privacy and more features. Android has a bit more flexibility, but third-party apps can effectively turn an iOS device into one as well; at the same time they make that phone essentially worthless.
In summary, Instagram Pro is even more amazing on Android; however using it for iOS would be close to impossible due to Apple's closed source environment which requires jailbreak and comes with many trades-offs. Check out instagram pro for additional info and options.