Please check the updated system requirements on the download page. This includes iPhones 5S, 6 and later, as well as iPads of 5th generation and newer. Speedify works on all iOS and iPadOS devices starting with iOS 12 and later. It provides world-class encryption, without forcing you to sacrifice speed or reliability. You don’t have to do anything, and you most likely won’t even notice anything different is happening. It is equipped with auto failover so that if one connection goes down, it routes all the data through the existing connection until the lost connection is restored. Speedify runs in the background of your iPhone proactively monitoring the quality of your connections.
What you get is increased bandwidth, which allows all of your apps to run faster. This means it uses your iPhone’s Wi-Fi and mobile data connections at the same time. The data is rapidly reassembled and encrypted on the server. The Speedify protocol uses multiple parallel sockets to connect with the VPN server.