Georgia Tech is developing a mobile app to help the visually impaired type on their phones. Called BrailleTouch, the open-source app features a six-button set-up — with three buttons on either side of the screen — and the device is held with the screen facing away from you. Written Braille characters use a six-dot code for the English alphabet, with different combinations of dots corresponding to each of the 26 letters (and various symbols). BrailleTouch will read out the letters as you type, and early research shows that users have been able to type at speeds of up to 32 words per minute while maintaining 92 percent accuracy. In addition to aiding the visually impaired, the team behind BrailleTouch is also looking at turning the prototype into an "eyes-free" texting technology for those with sight. So far the group has developed the app for both the iPhone and iPad, with an Android version currently in the works.