DAF Professional8.9.6
Publisher Description
DAF Professional -Speech therapy app for stuttering, stammering, Parkinson's using DAF fluency
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 support@speechtools.co
About DAF Professional
The company that develops DAF Professional is Speechtools Ltd - Speech Therapy Help. The latest version released by its developer is 8.9.6. This app was rated by 2 users of our site and has an average rating of 2.0.
To install DAF Professional on your Android device, just click the green Continue To App button above to start the installation process. The app is listed on our website since 2026-01-29 and was downloaded 533 times. We have already checked if the download link is safe, however for your own protection we recommend that you scan the downloaded app with your antivirus. Your antivirus may detect the DAF Professional as malware as malware if the download link to co.speechtools.DAFPro is broken.
How to install DAF Professional on your Android device:
- Click on the Continue To App button on our website. This will redirect you to Google Play.
- Once the DAF Professional is shown in the Google Play listing of your Android device, you can start its download and installation. Tap on the Install button located below the search bar and to the right of the app icon.
- A pop-up window with the permissions required by DAF Professional will be shown. Click on Accept to continue the process.
- DAF Professional will be downloaded onto your device, displaying a progress. Once the download completes, the installation will start and you'll get a notification after the installation is finished.
Program Details
System requirements
Download information
Pricing
Version History
version 8.9.6
posted on 2026-01-29
Minor bug fixes
version 8.8.2
posted on 2026-01-11
Audio bug fixes
version 8.6.4
posted on 2025-10-09
Bug fixes
version 8.5.1
posted on 2025-07-02
Improved pitch changing
version 8.1.2
posted on 2025-02-07
Translations added
version 8.0.14
posted on 2024-12-11
version 8.0.12
posted on 2024-10-15
Fix working when screen is off on some devices
version 7.4.1
posted on 2023-11-28
Added option for low latency mode
version 7.3.1
posted on 2023-11-06
Bug fixes for some Bluetooth devices
version 7.0.12
posted on 2023-07-31
Lowest latency of any DAF app
Fix issue with some Bluetooth headsets not using correct microphone



