When comparing Wally vs Backdrops, the Slant community recommends Wally for most people. In the question“What are the best wallpaper apps for Android?” Wally is ranked 2nd while Backdrops is ranked 3rd. 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 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.
Pro Daily updates
New wallpapers are released every day and a different wallpaper is featured every day.
Pro All original pieces
The app includes wallpapers created in-house by the app's team as well as original images sent in by users.
Cons
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.
Con Free version has ads
The ads can be removed by purchasing the pro version.