I would like to evaluate IFace SDK for iOS, but I couldn't find the download link. CRM portal offers links only for Android, Windows and Linux OS.
We do have the IFace SDK available for iOS, however, we do not distribute it within our evaluation program. There are certain license control issues on the iOS so this SDK is only available as a commercial product. We would recommend evaluating the Android SDK though - there is a 100% feature parity between the Android and iOS versions so you'll be able to get a good idea about the functionality of the SDK.