'Create and share dynamic conversations around documents, snapshots, diagrams and videos -- basically anything there is to talk about. Talk, type, and draw right on the screen. VoiceThread takes conversations to the next level, capturing the user's presence, not just comments. Users can join the discussion from iPhone, iPad, iPod touch, Mac or PC.
This is a free app. However, after creating five free Voicethreads, you need to either by a five pack of VoiceThreads through in-app purchase for $2.99 OR purchase a K-12, Higher Ed., or Business license. Three levels of licenses are available within K-12, Higher Ed. and Business.