It is very useful...But
There is a Caveat: In order to save the pictures the pictures youve "edited", YOU MUST HAVE A REAL GRAPHIC DESIGN APP INSTALLED BEFORE YOU CAN ACTUALLY SAVE AND USE THE PICTURE BEFORE USING THIS PROGRAM.
Normally, you would use graphic design app to edit the Resolution to fit, But This Program Is Great If Youd like to Change Your Wallpaper On The Fly.
If you use an app like iDraw with this Fit To Screen app, you can quickly edit, then save the picture to iDraw and easily add the picture to your Wallpaper. Its free and it saves time, even if youre a graphic designer.
RealisticCritic about
Wallpaper Fit - Custom Background Wallpaper and Lock Screen from Your Photo Picture and Image for iOS 7