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 it involves developer resources on your app team to instantiate a webview layer in your app, which can be styled however your team would like. That layer checks our endpoint to see if a given screener should display or not. Then the app intercept will 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