I didn't like the implementation job the on the Gaia topo maps. They're vector maps, which saves on data storage space, but too much detail is lost too quickly when you zoom out. The ESRI/USGS topos and the HEMA USA Atlas have implemented zooming better, IMO. I don't think that they're vector, but my phone has 256 GB storage, so I don't have to be concerned with large amounts of map data storage. The ESRI/USGS ones are my favorite, but some areas seem to be scanned at lower resolution, which can be annoying.Have you compared the HEMA Atlas with any of the GAIA maps? If so how do they compare?