Free App Stops Texting While Driving ...and tweeting, Facebooking, and emailing, too By Neal Colgrass, Newser Staff Posted Sep 4, 2011 3:30 PM CDT Updated Sep 4, 2011 4:30 PM CDT 7 comments Comments In this photo taken Dec. 15, 2009, Tina Derby sends text messages while driving in Concord, N.H. Tina Derby loves the ease and speed of text messages, even while driving, and sees no need to pull over... (AP Photo/Jim Cole) (Newser) – In the habit of whipping off a few texts and emails while driving? Then know that 23% of all US motor vehicle accidents, or 1.3 million crashes annually, are caused by cell phone talking and texting—and know that there's a free app to stop you. Called iZup Lite, it blocks all texting, tweeting, and emailing while driving. And it works automatically, using a GPS satellite to gauge your speed, the Boston Herald reports. Available for Android smartphones and soon for Blackberries, the app is similar to the original iZup, which costs about $20 a year and also blocks phone calls. iZup is "doing extremely well with fleets and enterprises,” said the CEO of Needham, which launched both apps. “We have distributed iZup in the many thousands of licenses.” One other benefit of iZup: It keeps you from doing something that's illegal in 35 states.