Make sure 5UF VPN is the latest version from the App Store. Builds 5.3 and newer officially support iOS 16 and later, fixing most cases where the app could not run on iOS 16. If your iPhone or iPad runs iOS 16+, update the app to 5.3 or higher (use the version number shown in the App Store).
More details: iOS client update announcement.
On iOS 15 or earlier, or if the hardware cannot upgrade to iOS 16+, the official app may still be limited. You can:
- Upgrade iOS as far as your device allows, then install or update the official app; or
- Use a third-party VPN client with 5UF where appropriate.
Tutorial: How to use a third-party app with 5UF VPN
If issues remain on 5.3+, contact support with your iOS and app version.
