I've been using many apps for a few months and have some informed opinions now on Android apps for offroading. Comments on these 3:
All-in-One Offline Maps (free plus paid for custom map import filters): the surprise winner in my tests of so many apps. Fast display/scroll/zoom, wide array of maps second only to Gaia, great info on screen regarding map storage, connectivity, layers, zooms, etc. Much better app functionality all in all than Gaia, but more importantly solid vs Gaia's flakiness. Better offline map downloading with solid downloading speeds and no mysterious pauses and failures like Gaia. My go to currently. I rarely see it mentioned and don't know why this very well done app doesn't get more attention. The free version is excellent, with the paid import filters unnecessary for the vast majority of users. The app is sophisticated and has a bit to learn, but is well laid out. If only Gaia's app was this good. https://play.google.com/store/apps/details?id=net.psyberia.offlinemaps
Gaia (free plus paid for extra features): Most full featured setup, widest array of maps (including NatGeo) by a smidge over the above app, a good, fast web interface for waypointing/searching/routing that has the same layers available as the app and it syncs, etc. The web interface is really special to have for pre-routing at home, no doubt. However, the Android app is lacking. It's slow to display/scroll/zoom, especially when offline reading downloaded maps, crashes too much, chokes on large downloaded maps while panning/zooming, and doesn't do large area downloading well. The offline downloading is so poor in fact that I would not recommend this app for large area, long transit trekking where you might plan to hit wifi hotspots along the way. Much too slow and flaky for that.
For CO maps, COTREX (free): Fast display/scroll/zoom, superbly simple and effective offline downloading setup, but limited to 2 maps and satellite imagery, and not as full featured as the ambitious apps above. The 2 maps are a USFS 2016-like topo and modified MVUM, though. Which I've found to be a good pair. If only all mapping apps would adopt this app's download setup, which is based on the principle of selecting predefined boxed areas, with easy referencing to see what is already downloaded. Reminiscent of Garmin's setup with the old Mapsource software of years ago.https://play.google.com/store/apps/details?id=com.cotrexapp
All-in-One Offline Maps (free plus paid for custom map import filters): the surprise winner in my tests of so many apps. Fast display/scroll/zoom, wide array of maps second only to Gaia, great info on screen regarding map storage, connectivity, layers, zooms, etc. Much better app functionality all in all than Gaia, but more importantly solid vs Gaia's flakiness. Better offline map downloading with solid downloading speeds and no mysterious pauses and failures like Gaia. My go to currently. I rarely see it mentioned and don't know why this very well done app doesn't get more attention. The free version is excellent, with the paid import filters unnecessary for the vast majority of users. The app is sophisticated and has a bit to learn, but is well laid out. If only Gaia's app was this good. https://play.google.com/store/apps/details?id=net.psyberia.offlinemaps
Gaia (free plus paid for extra features): Most full featured setup, widest array of maps (including NatGeo) by a smidge over the above app, a good, fast web interface for waypointing/searching/routing that has the same layers available as the app and it syncs, etc. The web interface is really special to have for pre-routing at home, no doubt. However, the Android app is lacking. It's slow to display/scroll/zoom, especially when offline reading downloaded maps, crashes too much, chokes on large downloaded maps while panning/zooming, and doesn't do large area downloading well. The offline downloading is so poor in fact that I would not recommend this app for large area, long transit trekking where you might plan to hit wifi hotspots along the way. Much too slow and flaky for that.
For CO maps, COTREX (free): Fast display/scroll/zoom, superbly simple and effective offline downloading setup, but limited to 2 maps and satellite imagery, and not as full featured as the ambitious apps above. The 2 maps are a USFS 2016-like topo and modified MVUM, though. Which I've found to be a good pair. If only all mapping apps would adopt this app's download setup, which is based on the principle of selecting predefined boxed areas, with easy referencing to see what is already downloaded. Reminiscent of Garmin's setup with the old Mapsource software of years ago.https://play.google.com/store/apps/details?id=com.cotrexapp
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