SpeechGym is a stuttering therapy software aimed to help people with stuttering problem control their speech fluency keeping a confidence. SpeechGym is a significant fluency enhancer. It implements Delayed Auditory Feedback (DAF) technique. Basically the program records your voice from a microphone, delays it by a number of milliseconds, and plays the delayed sound back through headphones.
) "SpeechGym Mobile - Click to enlarge screenshot")