I recently tried. While I just finished day 3 it has helped me reduce length of blocks. I didnt try speech therapy till recently, but it focuses in acceptance. However, my stuttering kept getting worse. SLP did say to try to hold out first sound of the word which for me did not help, it made worse then I would become out of breathe as the consonant sound did not release. So I like that your program suggest to stretch out vowel in first syllable (flexible rate). Its at times tricky to do in the moment but so far only thing that has helped so far worth the $99 a year. I like most the examples you give with techniques! I will leave a review for the app once I get farther. But thank you so far for this option which is affordable when most therapies are not for me, but I guess that is what can happen when going into debt of getting Phd and working for a public school.