Version history
DAF Professional
20
ASO score
Text
25/100
Reviews
0/100
Graphic
40/100
Other
0/100
App Rating
3.1
Votes
6.45K
App Age
14y 3m
Last Update
Dec 12, 2025
Compare with Category Top Apps
|
Metrics
|
Current App
|
Category Top Average
|
Difference
|
|---|---|---|---|
|
Installs
|
5.7K
|
2.4M
|
-100%
|
|
Rating
|
2.72
|
4.18
|
-35%
|
|
Number of Ratings (Voted)
|
2.8K
|
2.5M
|
-100%
|
|
App Age
|
14y 3m
|
7y 7m
|
+87%
|
|
Price
|
$1
|
$3
|
-51%
|
|
In-app Purchases Price
|
$0
|
$47
|
|
|
Update Frequency
|
28d
|
152d
|
-82%
|
|
Title Length
|
16
|
25
|
-36%
|
|
Short Description Length
|
80
|
62
|
+29%
|
|
Description Length
|
3 457
|
2 642
|
+31%
|
|
Number of Screenshots
|
627
|
1266
|
-50
%
|
|
Has Video?
|
No
|
0% has videos
|
|
|
Size
|
0MB
|
0MB
|
|
Category Ranking in United States
7 days
Last 7 days
Last 30 days
Last 90 days
Last 180 days
Last year
| Top | Dec 19, 2025 | Dec 26, 2025 |
|---|---|---|
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No results were found!
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| Top | Dec 19, 2025 | Dec 26, 2025 |
|---|---|---|
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No results were found!
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| Top | Dec 19, 2025 | Dec 26, 2025 |
|---|---|---|
|
No results were found!
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| Top | Dec 19, 2025 | Dec 26, 2025 |
|---|---|---|
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No results were found!
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||
Downloads
Downloads Graph
Total
5.6K
Last month
76
Text ASO
Title
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Characters:
16
of 50
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DAF Professional
Short Description
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Characters:
80
of 80
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Speech therapy app for stuttering, stammering, Parkinson's using DAF fluency
Description
(
Characters:
3457
of 4000
)
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}
Read more
Other
Additional Information
| Rating: | |
| Voted: | 6.45K |
| Google Play Link: | |
| Price: | 4.01 $ |
| Website: | |
| Email: | |
| Privacy Policy: | |
| Categories: | Medical |
| Size: | - |
| Installs: | 5.63K |
| App Age: | 14 years 3 months |
| Release Date: | Sep 18, 2011 |
| Last Update: | Dec 12, 2025 |
| Version: | 8.7.6 |
Version history
8.7.6
Dec 12, 2025
Fixed latency and audio quality issues
8.7.2
Nov 11, 2025
Audio bug fixes