Want to change the imagery on your smartphone? You'll find plenty of help with the best wallpaper apps. We've rounded up the top apps for both iOS and Android.

Digital Trends’ all-new wallpaper collection comes in themes for every machine, ... And they’re available in every resolution up to 4K. Go ahead, try one on.

Developed by Sumo Digital and published by Deep Silver, ... Dead Island 2 wallpapers for 4K, 1080p HD and 720p HD resolutions and are best suited for Desktops, android phones, ...

Today I stumbled upon Microsoft’s 4K rendering of the Windows XP wallpaper Microsoft Design site has a ton of attractive wallpapers, retro and otherwise.