Information lookup is an excellent app. Why is it retired?
ALL apps should contain the ability to search using the Esri world geocoder, zoom in and bring back data from one of the operational layers in the the web map.
Its great that it can bring back pop-ups from multiple layers, and they appear as they did in the web map viewer.
It has a good error message when it doesn't find anything.
Zone lookup is a 'similar' app but not complete. It has an annoying side bar. It does not zoom in to the address if it doesnt intersect anything from your address search. No-popup is opened. It has a bad habit of jumping off a polygon you are trying to select and instead clicking an empty area and then saying no result.