I purchased this app to use during my July 2015 thru hike of the TRT and I was very impressed with the functionality. It worked just as advertised and I consider it $6 well spent. I found myself using it several times a day just to check my progress, distance to various waypoints, etc... I'm an old school guy and I will continue to carry my compass and paper maps, but I can honestly say that having this app adds to my sense of security on the trail and is great fun to use as well. The only negative I can come up with is that the app seemed to sometimes get a bit confused momentarily when repositioning my android phone from landscape to portrait orientation or vice versa. Not a big deal, but maybe something for the developer to consider in a future upgrade.
--Improved user interface
--Tap on trail for information
--Tap on side trails for information
--Improved elevation profile with preview chart