Apple Touch ID for the Wings Mobile App is currently available for the iPhone 5S, iPhone 6 and 6 Plus, iPad Air 2, as well as the iPad Mini 3.
Please note that iOS 8.0 or higher is required for Touch ID to work. You may also have to enable Touch ID in your iPhone settings.
Below are the steps on how to set up Touch ID for the Wings Mobile App. (Click links for photo screenshots).