OldMapsOnline is an innovative travel and navigation application designed for Android devices, allowing users to explore historical maps in an engaging way. The app features over 500,000 high-resolution scanned maps, enabling users to visualize changes in political boundaries and landscapes across different eras. With an interactive timeline, users can select specific years to view historical data relevant to that period, seeing how places of interest evolved over time.

The application includes intuitive search options, allowing users to zoom in on a world map or type in a location to access old maps. Additionally, users can overlay historical maps on modern ones for comparison, enhancing their understanding of urban growth and development. The integration of Wikipedia provides further context, while a browser extension facilitates the addition of new maps to the collection, fostering community engagement and expanding the app's resources.