Using a dictionary can be very difficult if you do not know how to spell the word you are looking for. The free Merriam-Webster app for iOS and Android solves this problem. The app allows the users to speak their search into their device just with their voice. The speech recognition is very accurate and speedy. Voice activation allows users to search for word that they can not spell. In addition to voice search, the app includes a pronunciation button which allows you to hear the correct pronunciation of a word. The app uses Nuance's speech recognition engine for voice activation. To download the free Android app click here. To download the free iPhone, iPod Touch and iPad app click here.