The regular Javascrip embed code of a unit, once added to the article or webpage in your CMS will also work in In-App iOS. The same is true for a header tag and playlist integration.
However, if you are an Apester monetisation partner, to earn an income on your iOS in-app traffic you'll need to add the Apester iOS SDK to your app. The SDK enables Apester to fetch the Identifier for Advertising (IFA) and pass it on to our ad demand partners.
Download and install it from Apester's Development Center: