I traveled full-time in a motorhome for about four years, and I literally can't count the number of times I have furiously shouted "Goddammit, Google, cache you

I traveled full-time in a motorhome for about four years, and I literally can't count the number of times I have furiously shouted "Goddammit, Google, cache your shit!" at my phone. I don't frequently get angry at inanimate objects (or faceless corporations), but this is a uniquely infuriating problem. I had other map and navigation apps, including quite pricey ones. And, I had a dedicated Garmin GPS. All could navigat and provide maps without a network connections. But, they all suck in other ways. Google Maps is clearly superior in every regard except that it will leave you on your own when you get off the grid, which is a pretty big deal...made more frustrating because it's difficult to guess when it's going to fail completely and make driving really stressful for a little while. They allegedly added caching of routes a few years back, but it never worked very well. Any change, addition of another destination along the route, changing zoom level, searching for gas and then trying to go back to your original route, would all cause it to lose the cached information. It was pretty much worthless because it would invalidate the cache at the drop of a hat. I'm hitting the road again, in a travel trailer, and I gave away my GPS because I have less space for extraneous things. I also assumed that things are better on the Android app GPS front (when I started traveling back then, I was using a Google dev phone, the first one based on the G1...so, all things Android have improved a little bit).