On April 1 at Build 2016 event, Microsoft announced the preview of Skype for Business App SDK.
The Skype for Business App SDK for iOS and Android will allow you to light up Skype messages, audio and video within your own apps. For the initial preview release, this SDK will enable remote advisor experiences (patient talking to doctor, client talking to financial advisor, etc) built upon Skype for Business meetings.
A recording of the session of David Newman and Richard Taylo is available on Channel9.
I recommend visiting http://dev.office.com/skype and sign up at https://www.skype.com/en/business/sdksignup/ for news about the Skype for Business App SDK for iOS and Android and other news about the Skype Developer Platform.