DAF Pro: Stuttering/Stammering is the world's leading Delayed Auditory Feedback (DAF) app, designed to assist individuals who stutter or have neurological conditions such as Parkinson's Disease. Developed by Speechtools Ltd, this app helps users improve their speech clarity by slowing down their rate of speech.

With its user-friendly interface and professional speech therapy features, DAF Pro: Stuttering/Stammering has the potential to make a significant difference in the lives of those who struggle with speech disorders. Created and tested by a certified and practicing Speech and Language Therapist, this app delivers incredibly low latency feedback, even when running in the background.

DAF Pro: Stuttering/Stammering utilizes DAF, a well-established tool in speech and language therapy. By altering the user's auditory feedback loop, this app disrupts the normal speech pattern, prompting the speaker to slow down. Research has shown that DAF can benefit approximately one-third of individuals with stutters or Parkinson's Disease.

The app is compatible with iPhone and can be used with Bluetooth devices, although there may be an additional 60ms delay in the feedback system when using Bluetooth. It is important to note that DAF Pro: Stuttering/Stammering cannot be used during phone calls or simultaneously with other media apps.

DAF Pro: Stuttering/Stammering is fully GDPR compliant and respects user privacy by seeking consent before collecting any data. For feedback or inquiries, users can contact the developer at