When comparing Wally vs QuickPic, the Slant community recommends Wally for most people. In the question“What are the best Material Design apps?” Wally is ranked 32nd while QuickPic is ranked 55th. 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.
Ranked in these QuestionsQuestion Ranking
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 Fast performance loading photos
QuickPic displays photos ultra fast and performs better than most stock gallery apps. Developed with speed in mind, QuickPic will make working with any library of photos lightning quick.
Pro Supports multiple online photo album services
QuickPic integrates with: Flickr, Picasa, 500px, and many more.
Pro Supports hidden images
In order to hide an image, start the title with a period. This can be great for privacy purposes.
Pro Excellent file management tools
QuickPic offers excellent file management tools, with the ability to move and rename photos, users are in total control over the photo library. Easily find new photos by date or location with the grouping tool.

Pro Impressive video-player
Allows to lock a video in landscape mode and intuitive controls via swipe gestures.
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 Buggy and unstable since acquisition by Cheetah Mobile
v5.0.0, after acquisition by Cheetah Mobile, has countless bugs and basically nonoperational. This, probably, clone of original app, assembled from alternative, home-made and very low quality source code.
Con Untrustworthy
It's owned by Cheetah Mobile. That says it all.
Con Removed from Play Store in 2018 and rightfully so
