The 1.1 version of PrettyScreenApp for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. The application relates to Theming Tools. The actual developer of this free Mac application is Marek Rogosz.
From the developer:
PrettyScreenApp downloads wallpapers for your desktop. The tool lets you choose from multiple themes that fit your personal preference. It supports multi-screen configurations. In addition, the program allows you to customize the update interval and the image source configuration.
You may want to check out more Mac applications, such as App for the milk, Webshots Daily Features or Picture Switcher, which might be similar to PrettyScreenApp.