Turn Your iPhone Or iPad Into An External Monitor For Your Mac

Mac users wanting an extra monitor can turn their iPhones and iPads into external displays. All you need to do is download the iDisplay app, an extension for OS X, and let the data flow over either 3G or Wi-Fi. Ta-da!

Yes, the connection goes both directions, so you'll be able to use your multitouch gadget as an input device. The iDisplay app is $5.99 in iTunes, and the corresponding OS X extension is available through the iDisplay website. [iTunes]

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