Download of SyncWallpaper 1.0 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The software lies within Theming Tools, more precisely Wallpapers. This free Mac application is an intellectual property of Gear Zero Network Inc.
From the developer:
SyncWallpaper is an application that lets you share the same wallpaper on all your devices. The application provides attractive wallpapers. You can browse the wallpaper collection and select the image you prefer most. The same picture can bet set as default wallpaper both on a Mac computer and portable devices.
You may want to check out more software for Mac, such as Contemporary Art Wallpapers or reddwall, which might be related to SyncWallpaper.