The safest and correct way:

Before installing the old version, you must remove the official one from your iPhone.

: If the app fails to install, you can still access Instagram via Safari on your device to use basic features. Current Instagram iOS Status (April 2026)

: The most reliable way is to use your phone's browser (Safari or Chrome) to visit Instagram.com. You can add a shortcut to your home screen for quick access, providing an experience similar to the app without the installation requirements.

can often still download a "last compatible version" through specific App Store workarounds. help.backmarket.com Download Guide for iOS 12.5.7

The app will now appear with a cloud icon, allowing you to download the older compatible version. What’s New in Instagram (2026 Updates)