This is difficult to demo - so here are some buttons to force the banner to open. Don't dismiss (×) the banner or click the VIEW button yet - I don't have Apple Store / Google Play IDs (and if it's pressed the banner will no longer display):
Demo Android version
Demo iOS version
NB: When we have the IDs etc - we would use the standard Apple code (one line of text) for iOS and only use this roll-your-own code for Android.