Hi,
This looks like inbound/unitary interactions that you can integrate on a web site. I'm not sure this is relevant for mobile application as well though, but here is the information i can think about: https://docs.campaign.adobe.com/doc/AC/en/ITA_Unitary_interactions_Calling_the_offer_engine__inbound...
If that does not help, I'd recommend reaching out to professional services to check if they have experience with this use case.
On another hand, In 2018 there should be some new capabilities for Adobe Campaign Standard to integrate a new offer module as well as in-app messages. Though I don't have information or timeline to share right now.
Hope this helps,
Florent