DAF Pro: Stutter & Parkinson's is made and published by Speechtools Ltd. AppBrain is an independent app data site and isn't affiliated with Speechtools Ltd. The app name, icon, screenshots and description belong to Speechtools Ltd and are shown as published on the App Store.

About DAF Pro: Stutter & Parkinson's

DAF Pro: Stutter & Parkinson's is a medical app developed by Speechtools Ltd.

User Ratings

DAF Pro: Stutter & Parkinson's is rated 4.46 out of 5 stars. The rating is based on 97 ratings.

App Information

DAF Pro: Stutter & Parkinson's costs $5.99. The app size is 11.61 MB. The latest version available is 4.10.0. The last update was on September 17, 2026.

Technical Requirements

The app has a content rating of Everyone. The app has been available on the App Store since January 2012.

Description by Speechtools Ltd (from the App Store)

DAF Pro helps people who stutter and people with Parkinson's slow down and speak more fluently. Put on headphones, speak, and hear your own voice a fraction of a second later.

How It Works
Delayed auditory feedback (DAF) is a clinically recognized speech therapy technique. Hearing your voice on a short delay naturally slows your speaking rate, which can make speech smoother and clearer. Research suggests DAF helps around 1 in 3 people who stutter, and it is also used to help people with Parkinson's control their speaking rate.

Who It's For
* People who stutter or stammer
* People with Parkinson's disease
* People with dysarthria
* People who clutter
* Speech-language pathologists, for therapy sessions and home practice

Features
* Adjustable delay and pitch shift
* Very low latency, so short delays stay short
* Keeps working in the background and with the screen off
* Record and play back your speech
* Works with wired and Bluetooth headsets. Bluetooth adds extra delay that varies by headset, so wired headphones work best for short delays.

Getting Started
Put on headphones, set the delay to around 50–100 ms, press Start and speak. Then adjust until your speech feels slower and steadier.

Built by a UK speech and language therapist. One-time purchase: no subscription, no ads, no account needed.

Questions or feedback? Contact us at support@speechtools.co

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Screenshots

Screenshots by Speechtools Ltd, from the the App Store listing

Official page on the App Store

Alternatives to DAF Pro: Stutter & Parkinson's

Changelog of DAF Pro: Stutter & Parkinson's

No changelog data

Developer information for Speechtools Ltd

Speechtools Ltd

Address:

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App Store Rankings for DAF Pro: Stutter & Parkinson's

Top rankings

Rank	Country	Category	List
4	Saudi Arabia	Medical	Top Paid
24	Japan	Medical	Top Paid
15	Italy	Medical	Top Paid
47	United States	Medical	Top Paid
36	Canada	Medical	Top Paid
23	Russia	Medical	Top Paid
29	Turkey	Medical	Top Paid
34	South Korea	Medical	Top Paid
39	Brazil	Medical	Top Paid
79	France	Medical	Top Paid

Ranking history in Saudi Arabia

Ranking history

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Technologies used by DAF Pro: Stutter & Parkinson's

Frequently asked questions about DAF Pro: Stutter & Parkinson's

Is DAF Pro: Stutter & Parkinson's free?

No. DAF Pro: Stutter & Parkinson's costs $5.99 on the App Store.

Is DAF Pro: Stutter & Parkinson's still available?

Yes. DAF Pro: Stutter & Parkinson's is on the App Store, and the last update we saw was on September 17, 2026.

How large is DAF Pro: Stutter & Parkinson's?

DAF Pro: Stutter & Parkinson's is 11.61 MB.

Is DAF Pro: Stutter & Parkinson's suitable for children?

App Store rates the content of DAF Pro: Stutter & Parkinson's as suitable for everyone.

How do people rate DAF Pro: Stutter & Parkinson's?

DAF Pro: Stutter & Parkinson's scores 4.46 out of 5 stars, from 97 ratings on the App Store.

Who made DAF Pro: Stutter & Parkinson's?

DAF Pro: Stutter & Parkinson's was developed by Speechtools Ltd. It is listed in the medical category on the App Store.

What are the best alternatives to DAF Pro: Stutter & Parkinson's?

People looking at DAF Pro: Stutter & Parkinson's also look at these medical apps: Fonate DAF, Spaced Retrieval Therapy, ICD10 Consult Pro, BeneTalk: Stuttering Coach, Dysphagia.

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DAF Pro: Stutter & Parkinson's