Geo-referenced PDF viewer for Android

I have been using Avenza with maps I make myself for hiking and camping.  The program works really well and has the Motor Vehicle Use Maps for the National Forests in the store.  However, I have found some limitations.  One limitation is the size of the maps you can import, the other being the 3 map limit for the free version.  I am thinking of upgrading to get rid of the map limit, but I think that map size limitation has something to do with the program itself.  And there may be features of other programs I did not know I could use.

I was wondering if anyone knows of other apps for android besides Avenza that allow you to import geo-referenced pdf (or TIFF) files that you can then use offline.