The Compass app offers a range of features to provide users with valuable information about their current position. It functions offline, making it convenient for use in various settings. Users can access details such as true Geographic north, true altitude above sea level, sunrise and sunset times, and azimuth angles in different units. The app also includes a bubble level function and the ability to measure angles accurately. Additionally, it offers latitude and longitude coordinates in various formats, including MGRS and UTM, as well as British National Grid and SwissGrid systems.

For optimal performance, the Compass app is recommended for use in outdoor environments with minimal magnetic interference. It is noted that magnetic closure cell phone cases can impact the accuracy of the compass readings. The app utilizes the EGM96 Earth Gravitational Model as a geoid reference to calculate true altitude based on GPS data. The UTM coordinate system is employed to assign precise coordinates to locations on the Earth's surface, enhancing location accuracy for users.

Overall, the Compass app provides a user-friendly interface with essential tools for navigation and orientation. Users can benefit from features such as angle measurement, sensor accuracy information, and the detection of magnetic field strength variations. While some functionalities may require data connectivity, the app offers a comprehensive set of tools for outdoor enthusiasts, hikers, and anyone in need of reliable positioning information.