As an experienced user I tested 14 atlases including this one. ALTHOUGH IT IS THE BEST OF ALL 14, I give only3* One star down because of laggy scrolling on the map (xiaomi mi max 4GB, fullhd). This makes work uncomfortable and I'm sure it could be done more smoothly. Another star down for low map resolution. Even with a smaller zoom, the compression of maps is very noticeable. It can be understood, the application has only 329MB. On the other hand, this can also be solved. For example, the atlas of European birds on google play also has a couple hundreds MBs and can be used for common use very well. But involved users can download through the application additional components to their phones - offline sounds, high resolution photos, wikipedia, Up to 1.5GB of data! Here, such a possibility would also be useful, even if the atlas should be up to 5 times bigger, it would be worth it. Higher resolution/lower compression, possibility to choose the zoom level to download, other types of maps (industry, mineral sources, etc.), downloading wikipedia articles for offline reading ... Ocean/Sea/Lakes lack depth. Mountains altitude. Please fix it and I will raise the stars.