WhatsApp (deprecated), Facebook Messenger (login loop), Twitter/X (API errors), Reddit (certificate expired).
Finding apps for iOS 9.3.5 in 2026 can be tricky since most major apps now require much newer versions. However, many "legacy" versions of popular apps are still accessible if you have previously "purchased" them on your Apple ID. ios 9.3.5 compatible apps list
While iOS 9.3.5 is considered a legacy operating system, many essential apps can still be installed by downloading "last compatible versions" through your App Store purchase history Facebook Messenger (login loop)