If you are interested in BackCountry Navigator Pro for your Android based tablet, there is a year end sale today...

Link to Google Play Store

Also, the BackCountry Navigator XE is also available now on the Google Play Store.  The Promo Code is "2019ENDS" and this will work through New Years Eve.  This new system now includes integration with APRSDroid, to show locations on the maps similar to how BackCountry Navigator Pro works.  This new system has better maps available and works on a subscription model to support the maps.  Easier map downloads as well as some other new features make this another good option for offroad navigation.  I have been a beta tester for this app for about a year now, and it is no longer in beta.  You can learn more about this and the specials by going to Link to BackCountry Navigator XE