The myriad apps making their way onto Apple’s iPhone App store range from functional to preposterous.

However, here’s one that at first appears a bit of a gimmick, but could actually prove quite useful. The app uses the iPhone camera to display the illusion of a transparent screen, so you can see what’s in front of you while you carry on working in the application of your choice — for example, writing a text message or tweet.

The developers claim that it will work with any app that accepts copy and paste, and any site correctly configured for Mobile Safari.

A word of warning though: we’re not sure the police would accept it as an acceptable excuse for driving safely while texting your friends!