I remember the days when a World atlas would be the size of your desk. Nowadays though you can fit an entire World map in your pocket.
WorldMap is a Java-based interactive political map of Earth, based on the one in the CIA's World Factbook. Once you've installed the app you'll be presented with what looks like a title page with information about the map. At first it's unclear where you go from here, until you realize you can zoom out from the Menu screen, and that this key is actually a tiny part of the top right-hand corner of the map.
As well as being able to zoom in and out, you can move around WorldMap using the directional buttons or the 2, 4, 6 and 8 keys on your phone. There's also a feature for setting a marker, which lets you draw a line from one point to another, although it's unclear what the real benefits of this is.
WorldMap displays all the countries along with their capitals and major cities. It also displays oceans and lakes, as well as lines of longitude and latitude. I appreciate that this is a political map but it feels pretty sparse in terms of information. For instance there is no topographic view, the major rivers aren't shown, and it's very sparse in terms of the cities it displays.
Nevertheless, if you need a pocket-sized guide to the political boundaries of the Earth, WorldMap represents a clear and easy-to-navigate solution.