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" A Doctor Who Sonic Screwdriver app has launched to celebrate the BBC drama&amp;#039;s 50th anniversary. Four different types of the Doctor&amp;#039;s famous gadget - belonging to the third, fourth, 10th and 11th Doctors - are available to interact with in 3D.   &amp;amp;gt; &amp;#039;Doctor Who&amp;#039;: David Tennant&amp;#039;s Sonic Screwdriver TV remote hands-on The app is available on iPhones at \u00A31.50 thanks to the work of Developer Useless Creations, which was officially licensed to create the virtual Sonic Screwdriver by BBC Worldwide. Waving and titling the device allows users to change the gadget&amp;#039;s pitch using authentic sounds, while a shake with the 11th Doctor&amp;#039;s Sonic Screwdriver makes it extend as seen in the TV show. The iPhone&amp;#039;s camera flash button can also be used to create a flash, while a transparent background using the smartphone&amp;#039;s camera can be selected to show the screwdriver in real life situations. BBC One will unveil the official &amp;#039;Day of the Doctor&amp;#039; trailer this coming Saturday (November 9) in the build-up to the 50th anniversary special on November 23. Watch a teaser trailer for the Doctor Who 50th special below:      "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/tech/doctor-who/news/a529424/doctor-who-sonic-screwdriver-app-for-iphone-launched-by-bbc-worldwide/>