Screen Themer Free, developed by iNetWallpaper.com LTD, is an application that gives you a bunch of high res images for use as your home screen and lock screen. Screen Themer was featured by Apple in the New and Noteworty section of the App Store.
With Over 40 Retina themed matching wallpapers and lock screens you can quickly customize your iDevice and make it stand out from the rest. When you see a theme that you like you can quickly preview how it will look without saving the pictures to your camera roll. Once you decide you like the theme just hit ‘Save Theme’ and the pictures will be saved to your camera roll. To apply the theme, Open your Photos App and select Camera Roll. Tap Wallpaper and use the multi Function Button. Choose use as Wallpaper then one of the 3 options. Set Lockscreen, Set Homescreen, or Both.
Screen Themer Free is a great preview of some of the amazing themes that the paid version of the app has. The paid version of Screen Themer is $0.99 and offers over 250 Retina Themes to customize your device. Go check it out.