The basic idea of app intercepts (iOS & Android)

You can use Ethnio as an intercept in your iOS or Android app.The quick summary is that most development teams prefer to instantiate a web view layer in their app, checking our endpoint to see if a given screener should display or not. They then pull dynamic Ethnio screener content and design into the app via web calls. 

You can find implementation details for implementing Ethnio in your app as a Webview layer here