Geographer - World Factbook
Geographer is an elegant and powerful world atlas based on the CIA World Factbook. You'll find all of the World Factbook's rich country information, ranked lists and field definitions inside. But you'll find a whole lot more too.
While the World Factbook does mention cities, administrative divisions, mountains and lakes, it is primarily country-focused. Geographer supplements the World Factbook by adding rich information to these other entities in the form of sortable lists, Wikipedia excerpts, maps and photos.
Geographer is a more powerful World Factbook. A region filter can be applied to ranked lists to allow for regional comparisons. Ranked lists can be displayed as pins on a map, providing a different way to compare locations.
It's easy to change the current location or sort field from almost anywhere in the app, making it possible to compare without losing your context. City local times and distances from locations add a nice touch.