A full version app for Android, by UkropSoft.
TOPO is a mobile application for Android that is designed to perform topographic and geodetic calculations especially in the event that GPS is not available. It also helps in the preservation of coordinates such as tactical marks, observation posts, landmarks, and polygons). It also acts as a military artillery compass. With this app, you can use the map without the internet and be able to navigate your way still, towards your destination.
All of the helpful features are contained within a clean, user-friendly interface with an organized navigation drawer menu.