App is a great idea but for full functionality you have to sign in with facebook or google+, the concept of choosing wallpapers is too complicated and the app is a bigger leach than facebook app - it's running after closing and using cca 60-80MB RAM. Also what's the phone call permission for? Too intrusive, uninstalled, sorry.
Device: Samsung Galaxy S3 (GT-i9300)
Recovery: Philz advanced CWM 6.15.4
Kernel: Boeffla 5.2 (beta4)
ROM: ArchiDroid 1.7.11 (Samsung 4.3 based)
Theme: All Backs Black S3.3
Launcher: Nova Launcher 2.3
+ several mods and Xposed framework with several modules