After installing that app you can preview just by sliding your thumb from the edge of the screen. In settings Users can also rearrange the applications according to the position, insert any application, as well as choose a theme, control transparent and so on.
Recently Ubuntu Mobile OS had been shown off by canonical and after it some trends are already sparked in the market and now various apps, livewallpapers of Ubuntu OS is coming out. According to news its official launch is also due for October.
For those who want to try it, can download this application for free from
Google Play (link removed) today. While developer is strill giving it via Google Drive.