Android app covers areas covered by US charts, including sectionals, terminal area charts, helicopter charts and what's left of world charts. Also included is mapping via OpenStreetMaps for walking/biking to nearby $100 hamburger stands, as well as georeferenced approach plates and airport diagrams. Also provides OpenStreetMap-backed runway diagrams for all airports, though they are primarily used for those airports that don't have official FAA-provided airport diagram plates. Approach plates include an optional on-screen DME display that the user can configure.
Server provides scripts to populate and operate a server, fetching the required data from online FAA sources. The scripts should be run every 28 days.