In addition to many of the ones posted above, we also use:
-Weatherbug, with alert on based upon GPS location
-Spaky, shows lightening strikes and how far away. A subset of Weatherbug.
-Trip advisors city guides - for area points of interest
-US Public Lands
-As mentioned, Allstays
-Signal Check - For cell coverage signal strength
-And we shift between Radio Paradise, Pandora and Spotify to augment our Sirus...
-Whenever we have any questions about GPS routings. The DW turns on her iPhone Map Routing Turn by Turn. And then we try to use common sense (Sometimes this fails
!) on which one to believe...
(I did not repeat all of the ones from above, we have several, and will check out some of the others shared.)
Best to all, travel safe, have fun,