iOS 15 or newer. For optimal performance, an iPhone 8 or later with iOS 16+ is recommended.

: Ensuring "extra quality" in an app like Facebook's involves rigorous testing, including unit testing, UI testing, and continuous integration/continuous deployment (CI/CD) practices. This process helps in identifying and fixing bugs, improving performance, and enhancing the overall user experience.

: If you have previously "purchased" Facebook on your Apple ID, go to the Purchased tab in the App Store on your iOS 9.3.5 device. Tap the cloud icon next to Facebook; you should be prompted to download the "last compatible version".

However, these modifications require and injecting custom dylibs. Even then, the core Facebook service will eventually break because the app’s authentication tokens and API endpoints expire. No hacked IPA can “unbreak” server-side deprecation.