While we iterate on the search and functionality features within the app, you can alternately browse NARA's app collection on Historypin, where we are staging WWI content for the app. On Historypin you can browse via the collection map, by tags, by keyword, etc.
In addition, since we are working to map WWI film segments and photographs as close to a specific location as we can, there are instances where having exact addresses allows us to do Street View overlays! To search for the overlays that we've done so far, search "has streetview" in the collection search bar.
Finally, if you think you can help us enrich these WWI materials and can suggest better dates or locations, navigate to the particular "pin" in question and click "suggest a better date" or "suggest a better location." Note that you must sign up for a free Historypin account in order to do this.
Again, all the content that goes up in this Remembering WWI Historypin collection appears in the app as well, so that includes any updates you help make to the data.
Check back for more updates soon!