It's a Unity app, so `apktool` works well to get out all the assets. Nothing is obfuscated. There's also sample pipboy data file there too (for the demo mode).
Normally I keep notes on decompiling game files, but this time I didn't unfortunately :/
But I didn't get too far anyway - the DemoMode.bin file contains the demo data. There's a list of locations in a custom binary format, but the titles are readable.
I tried modifying the values to make them all visible, but the app threw a parsing exception when trying to load my modified file.
Have you got some kind of API? I'd be happy to look into connecting your map to the game. I think it would be nice to to need an app for this, but if this runs on a responsive website, that can connect to the game independently.
I tried decoding the binary data for the pipboy app, but didn't have much success. Perhaps someone smarter than me will be able to crack it.