Reddit user /u/PacketRacket, posting on Reddit’s ATAK SubReddit — /r/ATAK — pointed out that its possible to use ZeroTier’s personal virtual private network to configure a TAK network without a server.
With that insight, I created a tutorial on how to setup both your phone and the server to create a simple, functional network for CivTAK. There are also instructions for how to use the ZeroTier VPN as a VPN for CivTAK, though it won’t scale very well at all, and with just a little interest, that probably won’t hold up.
Here is the tutorial (Dummy’s Guide) on setting up a ZeroTAKServer.
And you can download CivTAK here.
If you have questions or suggestions, please post them on Reddit/r/ATAK.