Is there a Facebook app for iOS?

Downloading Facebook onto your iPhone is easy! Search for it on the App Store, then tap the GET button.

Many times, apps stop working because they need to be updated. So, you need to make sure that you have an up-to-date version of the Facebook app on your iPhone. Once the Facebook app is updated successfully, then again open the app and check if now the app is working or not.

FaceBook's requires iOS 12.4 or later.