Out of curiosity I downloaded Guthook's guide for the AT and I thought I'd share some stuff about it for others who might not have gotten around to it yet.
IMG_2166.png
It's essentially an overlay of the AT over your Maps app, with a few other tools.
IMG_2175.pngIMG_2167.pngIMG_2168.pngIMG_2169.png
Including an AWOL style elevation map
IMG_2172.png
There's also news alerts, if this is actually updated regularly it could be very useful.
IMG_2170.pngIMG_2171.png
It's not cheap ($68.91 for the whole AT) but it is pretty handy.
IMG_2173.png