United States Zip Postal Codes is a free Android app developed by Bene Soft that offers a comprehensive list of all United States ZIP codes. The app is organized by state and county, with an easy-to-use search function that allows users to find specific locations quickly.

One of the most useful features of the app is the ability to show selected cities and entire counties on a map. Users can also mark cities as favorites and review them later. Additionally, the app provides distance information between the user's current location and the selected city, as well as the distance between the selected city and other cities in the same county.

Another great feature is the link to Wikipedia for each city, providing more information about the location. The app is a great tool for anyone who needs to find ZIP codes or wants to explore areas of the United States.