Found one file extension association related to APM Planner and 1 file format developed specifically for use with APM Planner.
Platform, operating system: Multiplatform
Go to: APM Planner description
Developer: ArduPilot Dev Team
Developer / company: ArduPilot Dev Team
APM Planner is an open-source ground station application for MAVlink based autopilots including APM and PX4/Pixhawk that can be run on Windows, macOS, and Linux.
APM Planner works with the following file extensions:
Note: You can click on any file extension link from the list below, to view its detailed information. The list of extensions used or otherwise associated with the application may not be complete, because many common file extensions on our website, such as jpg (pictures) or txt (text files), can be opened by a large number of applications, or are too general file format. However most, if not all directly associated file extensions should be listed with its appropriate program. Although its likely, that some file extensions may be missing from the list of associated file extensions with the application, yet they can be opened, be part of, or otherwise be associated with the program.
APM Planner default file extension associations
Comparison table of actions that APM Planner can perform with its associated file type beta
This table might not contain all possible associated or supported file types or may contain incorrect data.
If you need more information please contact the developers of APM Planner (ArduPilot Dev Team), or check out their product website.
File type \ Action