DAF Professional

Speechtools Ltd - Speech Therapy Help

About this app

DAF Pro - Professional Speech Therapy App for Fluency & Clarity

DAF Pro is the world's leading speech therapy app using delayed auditory feedback (DAF) technology, trusted by thousands across 100+ countries. This professional fluency therapy tool helps people with stuttering, stammering, Parkinson's disease, dysarthria, and speech disorders achieve clearer, more controlled speech through real-time auditory feedback.

Designed by a certified Speech-Language Pathologist (MSc, PGDip, BAHons, HPC registered, RCSLT member), DAF Pro delivers ultra-low latency (20ms on Google Pixel devices) making it the most responsive speech therapy app available for Android.

What is Delayed Auditory Feedback?
Delayed auditory feedback (DAF) is a clinically recognized speech therapy technique that helps control speech rate and improve speech fluency. By hearing your voice with a slight delay, DAF encourages slower, clearer speech and reduces speech impediments. This evidence-based therapy method has been proven effective for stuttering therapy, stammering treatment, and Parkinson's speech rehabilitation.

Who Benefits from DAF Pro?
• Stuttering & Stammering: Reduces speech blocks, repetitions, and prolongations while promoting fluent speech
• Parkinson's Disease: Controls speech rate, reduces dysarthria, improves speech clarity and intelligibility
• Dysarthria & Motor Speech Disorders: Enhances articulation and speech precision
• Speech Therapy Patients: Provides portable therapy for home practice and skill generalization
• Speech-Language Pathologists: Professional-grade clinical tool for therapy sessions

Key Features:
✓ Ultra-Low Latency: Industry-leading 20ms delay for natural, real-time feedback
✓ Background Mode: Continue speech therapy while using other apps or making calls
✓ Customizable Settings: Adjust delay time, pitch shift, microphone boost, and noise gate
✓ Recording & Playback: Track your progress and practice sessions
✓ Therapist-Designed: Developed by certified SLP using evidence-based techniques
✓ Privacy-Focused: GDPR compliant, no data collection, works offline

Why DAF Pro Stands Out:
Unlike consumer speech apps, DAF Pro is a professional-grade therapy tool designed for clinical effectiveness. Our advanced audio processing delivers the fastest response time, while background audio mode allows continuous therapy during daily activities - features unavailable in competing stuttering apps or speech therapy tools.

Proven Results:
Delayed auditory feedback has been shown in clinical research to help 1 in 3 people who stutter achieve significant fluency improvement. Many users with Parkinson's disease report better speech rate control and reduced dysarthria symptoms when using DAF therapy consistently.

Perfect For:
• Daily speech fluency practice and therapy exercises
• Telephone confidence and workplace communication
• Public speaking preparation and presentation skills
• Complementing professional speech therapy sessions
• Managing speech anxiety and communication challenges

DAF Pro is your portable speech therapy solution - whether working independently or alongside a speech-language therapist, this fluency app brings professional-grade delayed auditory feedback therapy to your pocket.

Clinical-grade speech therapy tool | Evidence-based fluency treatment | Developed by certified Speech-Language Pathologist

Need support? Contact us at [e-mail]

Ratings and reviews

id like a refund thanks. DAF Jammer is free with less latency, the latency this advertises is false even with wired headsets

The app is very good. However, I find that when I use bluetooth earbuds, the app keeps using the phone microphone. As a result, the volume is low, and I've found over the years that for DAF FAF to be effective you need high volume, not to hear the sound of your own voice. Personally, I would be more than willing to pay for a perfect FAF DAF app that manages to mask the sound of your voice and guarantees a more reliable experience, and I strongly encourage speechtools to add more tweaks.

Please enable the device to have the option of using the Bluetooth microphone instead of the phone microphone. I have wireless earbuds but my phone microphone picks up every little sound, so it makes the app unusable. If you make the app able to use Bluetooth microphone it'll be 5 stars easy. Please fix this issue!

What's new

Audio bug fixes