Historical Markers is an educational application designed for iPhone users, providing access to over 140,000 historic markers across North America. This app offers detailed descriptions, images, and links to online historical resources, making it a valuable tool for history enthusiasts and travelers alike. Users can easily locate markers near their current position or browse through the extensive catalog available on their devices.

Key features of Historical Markers include a GPS utility for locating nearby markers, a text-to-speech engine for hands-free access to descriptions, and the ability to create a custom list of favorites. With offline access to the database, users can explore history without needing an active internet connection. The app also supports multithreading for enhanced performance and offers a comprehensive search utility to help users find markers efficiently.