I have been stuttering for all my life, now 38 years old. I have researched several of the expensive items such as speech easy. I was very eager to spend the thousands for that item but then through further research, I found that apps have been developed. Currently I have downloaded 5 different apps. My main concern is that other apps with delayed auditory feedback seemed to be too delayed. Some have 0ms while others have 4 minimum. In these cases, there seemed to be a longer time response to hear myself, so it didnt help much. This app, though it shows the minimum delay is 23 ms, it seems much quicker than the other apps who show a shorter delay time. I just started working with this, so in about 2 weeks, I will try to post again to give appropriate feedback. So far, I like this app the most as the delay time is very quick so I can hear myself as soon as I am speaking.