Nav Aid Pro Radio Navigation is an Android education and reference app developed by Mario Sabogal. The app aims to teach aviation radio navigation instruments through an intuitive interface. It includes all essential navigation instruments such as VOR, ADF, RMI, and HSI.

The app offers a position quiz that helps build situational awareness and can even be useful during airline interviews. Additionally, the app provides hold entries to build and test knowledge on holds. The app is constantly updated with new features to provide better ways for users to learn.

Overall, Nav Aid Pro Radio Navigation is an excellent app for those interested in learning aviation radio navigation instruments. The app has a user-friendly interface and provides a fun and engaging way to learn. It is brought to you by Pilot Effect, a world-wide leader in aviation education.