← All Apple listings

Apple

DAF Pro: Stutter & Parkinson's

by Speechtools Ltd more by this developer →

Ratings
97
Rating
4.5 · 97 ratings
Version
4.9.5
Last updated 09/15/2026

#116,180 of 719,896 by ratings on Apple · #1,748 of 13,163 in Medical

First seen by this census 09/05/2026 — the store does not publish a creation date

Last updated 09/15/2026

Tracked since 09/05/2026

View in the Apple store ↗

Compare with another extension

Category: Medical

Description

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

Alternatives to DAF Pro: Stutter & Parkinson's

Name Ratings Rating
qb DAF - Stuttering Speech Aid by Giuseppe Di Cienzo 4 4.8 compare
StrivePD Parkinson's Assistant by Rune Labs, Inc. 782 4.6 compare
Fonate DAF by Tane Langton 34 4.3 compare
Parkinson mPower 2 by Sage Bionetworks, a Not-For-Profit Research Organization 14 2.6 compare
BeCare Parkinson's by BeCare Link LLC 11 4.1 compare
Fluent Stuttering Calculator by Do Tri 6 2.8 compare
Parkinson's Disease Manager by At Point of Care, LLC 6 3.3 compare
MPI-2 Stuttering Treatment by Sirma Medical Systems AD 5 3.6 compare
Parkinson’s Disease [PD] by At Point of Care, LLC 3 3.7 compare
Parkinson pocketcards by Boerm Bruckmeier Verlag GmbH 3 2.0 compare

Growth

Change in ratings, scaled to each window from the real gap between crawls. A window needs a full period of history before it reports anything.

Per Growth Growth % Actual change Measured over
day Not enough history yet
week Not enough history yet
month Not enough history yet
year Not enough history yet

History

Ratings

09/15/2026 · 97 09/17/2026 · 97

Average rating

09/15/2026 · 4.5 09/17/2026 · 4.5

Version history

VersionFirst observed
4.9.509/15/2026
4.9.409/15/2026