This app was mentioned in 2 comments, with an average of 1.50 upvotes
have you ever tried one of those devices like a hearing aid? supposedly not being able to hear your own voice can help reduce/eliminate a stutter for some people. There are also apps, I found this one:
https://play.google.com/store/apps/details?id=com.pcp.stutterhelp&hl=en
A oni "slušni aparatići" koji ukidaju mucanje, mada nemam pojma jeli to uopće dobavljivo kod nas. A nije baš ni jeftino, link:
https://youtu.be/HuO3DbnQjxE?t=110
A postoje i aplikacije, koliko efektivne nemam pojma, ali vrijedi barem probati jer rade na istom principu odgađanja zvuka kao i SpeechEasy
Stuttering Help
DAF Delayed Auditory Feedback