Our plugin posts to all configured social networks at the time post goes live. Technically speaking our plugin is hooked to the event of changing post status from whatever to “Published”. This event is triggered when you hit “Publish” button, when you post on your site from email, when you publish post from your iOS/Android Device, and when scheduled post becomes live.

You need to check your code. iOS/Android devices are also posting via WordPress XMLRPC API and it is working fine.