I am in a process of purchasing license for SFTP/SSh lib for iOS. While reading the licensing agreement i am not clear with the term Developer. Is the developer means the iTunes account by which the iOS app has to be uploaded on App Store? Also will SFTP/SSH library will be sufficient for SCP file tranfer?
A "developer" is a human that is programming with the Chilkat API. The Chilkat licensing is royalty-free, which means your app can run on any computer regardless of the type of license purchased. There is no need to worry -- nothing is linked to any iTunes account..
(Yes, SSH/SFTP includes SCP.)