When comparing Atlas vs Wally, the Slant community recommends Wally for most people. In the question“What are the best Material Design apps?” Wally is ranked 32nd while Atlas is ranked 71st. The most important reason people chose Wally is:
The app allows searching for wallpapers by text and tags as well as allows filtering them by categories, resolution, and/or aspect ratio.
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Pros
Pro Built-in ad blocking
The browser uses EasyList data to remove ads from sites. It can further be supplemented with EasyPrivacy data to limit website ability to track you.
Pro Stores preferences on per-site basis
The browser can be set to remember which sites need to be shown in desktop mode, with certain content filtering settings, etc.
Pro Can browse two tabs at once
Atlas has a dual pane view that shows two pages side by side.
Pro Can be set to very low data usage
Pro Lots of different ways to find wallpapers
The app allows searching for wallpapers by text and tags as well as allows filtering them by categories, resolution, and/or aspect ratio.
Pro Has a huge selection of high quality wallpapers that's constantly updated
The app uses wallhaven.cc as the source for wallpapers. Wallhaven.cc, the successor of wallbase.cc, is a vast resource for high quality wallpapers.
Cons
Con Abandoned
Atlas was last updated on September 19, 2014.
Con app not available in play store
Con Buggy
Multiple people are reporting that the app can sometimes crash or crash the launcher or not work properly in some other way.