GCTools is a comprehensive geocaching tool collection designed to assist users in solving multi and mystery caches efficiently. The program offers a wide range of features, including target guidance, coordinate projections, distance calculations, line and circle intersections, coordinate conversions in various formats, and the ability to save and load coordinates within the app. Additionally, GCTools provides interfaces to popular mapping services like GoogleMaps, GoogleEarth, and more.

The application also includes tools for ciphers encoding and decoding, interactive data tables for various purposes such as cross sums and periodic systems, converters for different units of measurement, a built-in flashlight feature, and the option to save menu favorites for quick access. GCTools aims to be a versatile companion for geocaching enthusiasts seeking practical solutions for their caching adventures.