EchoLink for iOS version 2.10.18 is now available in the App Store. This is a 64-bit build that is fully compatible with iOS 10 and modern iOS devices. Requires iOS 8.0 or later.
EchoLink for iOS provides access to the EchoLink network for validated EchoLink users. You can use this app to connect to the EchoLink system from almost anywhere, using an iPhone, iPad, or iPod touch.
More Information - http://www.echolink.org/