Click . You may be prompted to enter your Apple ID password (this sends the app to Apple to generate a free developer certificate for your device). Once the status shows "Success," unlock your iOS device. Step 3: Trusting the Certificate

For devices running older operating systems, Apple and developers have built-in support for installing the final compatible version of an app. Here’s the correct procedure:

If the IPA method fails or the app keeps crashing, there is a simpler way. Open and go to ://facebook.com . Tap the Share button.

Navigate to > Device Management (or Profiles & Device Management ).

A prompt will appear: "Download an older version of this app?" Tap Download .

Free Apple Developer accounts only issue application certificates valid for 7 days. After 7 days, the Facebook app will stop opening. To fix this, simply plug your device back into your computer and run it through Sideloadly again to refresh the certificate for another week. To help you get the app running cleanly, let me know:

The term "verified" is where this search becomes complicated. In the context of iOS, a is one that has been approved and cryptographically signed by Apple, which only occurs when an app is distributed through the official App Store. Any app obtained outside of the App Store, including any third-party IPA file for Facebook, cannot be considered "verified" by Apple.

To bypass this, you need an IPA file (the iOS equivalent of an Android APK) that matches a version of Facebook back when 32-bit devices were still supported. Where to Find a Verified Facebook IPA

How to Get a Verified Download of the Facebook IPA for iOS 9.3.5

Many users hold devices stuck on legacy iOS versions (e.g., iOS 9.3.5). They may seek older versions of apps (Facebook) that are compatible with such devices. This raises questions about how to obtain and verify an .ipa (iOS application archive) safely and legally, and how to install it on devices that no longer receive app updates or support modern signing methods.

If the Facebook app immediately closes upon opening, you likely downloaded a 64-bit IPA file. Double-check your source and ensure you downloaded a version compiled for 32-bit devices (Version 110 or lower).