The back country app is for droid only. And if works great. It is not for trip planing.
It will record a track, or you can put it a destination.
We have a 7" tablet we use in the jeep. We are members of the FMCA 4 wheelers. And we down load tracks from their web site.
You can down load any gpx tracks from any gpx source, into back country. There are a lot of sources. Trail damage is a great site. So if anyone is a member, I would like an invite. You can export tracks also.
Just a note, off roading will be very rough on devices. They need to be properly secured. And you will probably need to have a power source. And wifi to find your gps.
Just another way to keep us safer on the trails. It's a great tool.