This is another app I developed using my SyncElements framework. The app contains accurate geographic map data (courtesy of NaturalEarthData.com), and can quiz you on your knowledge of world countries and major cities. You can also see a leaderboard of top scores.
As a concrete example of what can be achieved with SyncElements, I have written and published a new Android app called ‘U.S. Farmers Markets’, now available for free on Google Play. The app has data for over 8,000 markets compiled into the app, with the ability to also fetch new/modified markets via the ‘Refresh’ button.