I use the Top Hat Soaring ( http://www.tophatsoaring.org/
) version of XCSoar on my Nexus 7 and I won't leave home without it; and I use it in the sailplane as well.
There is a plethora of topics on setup and usage on this forum as well as GliderRacing.com and at Top Hat.
Here are some shots:
You do not have the required permissions to view the files attached to this post.