To find your iOS device identifiers, you can use this app:
After you install this app on your iOS device, it displays your device identifiers (including the Apple IFA) , as shown in the following screenshot.
The My TUNE Device app was designed to help with the integration and testing process when setting up the TUNE SDK. During the testing process, it is important to create a proper test profile. Simply launch the My TUNE Device app to find your device's Advertising Identifier (IFA), Advertising Vendor (IFV), and IP Address and share it.
For more information about Apple's Advertising Identifier and Advertising Vendor, please visit Apple's IFA vs IFV. For more information on test profiles, please visit Creating a Test Profile and Testing Your Mobile App.