If you’re looking for an alternative to Skala, then you should check out LiveView by Nicholas Zambetti. LiveView was the first real preview app that came onto the market, and it’s excellent. Like Skala, LiveView uses a Mac app and companion iOS app to mirror your Mac display to an iPhone or iPad.
LiveView is a specialized remote screen viewing application intended as a tool to help designers create graphics for mobile applications, it has also proven to be useful for creating quick and dirty simulations, demos, and experience prototypes.
FOR VISUAL DESIGNERS
Develop pixel–perfect graphics for the iPhone and iPad quickly and easily with a live view of your canvas/artboard while you work. LiveView is compatible with both standard and Retina displays.
FOR INTERACTION DESIGNERS
With your iPhone or iPad tethered via WiFi, you can interact with software prototypes and demos running on your Mac to communicate and iterate your concepts quickly.
If you’ve ever needed to press a button from afar or wished that you could take a piece of your monitor with you across the room, this app may prove useful from time to time.
Inspired by and created to support the vibrant prototyping culture at IUAV.