DAF Pro Downloads & RevenueDAF Pro: Stutter & Parkinson's · App Store
DAF Pro: Stutter & Parkinson's is #4 in Medical Paid in Brazil and charting in 15 of 30 countries we track.
Updated 11 Nov 2026 · rankings refresh through the day
24 Sep 2026DAF Pro: Stutter & Parkinson's update history & changes
Last change · 32 events since 3 Jan 2012Full timeline ↓Full timeline · 32 events
- 📈DAF Pro: Stutter & Parkinson's entered the top 100Top Paid · All Apps · PL
- 🚀DAF Pro: Stutter & Parkinson's: now shown next to DAF+N, Fonate DAF, qb DAF - Stuttering Speech Aid +1 morethe store's “similar apps” for it changed: who it's seen as competing with
- 📈DAF Pro: Stutter & Parkinson's entered the top 100Top Grossing · Medical · CN
- 📈DAF Pro: Stutter & Parkinson's entered the top 10Top Paid · Medical · RU
- 📈DAF Pro: Stutter & Parkinson's charting in a new countryPhilippines
- 📈DAF Pro: Stutter & Parkinson's charting in a new countryPoland
- 📈DAF Pro: Stutter & Parkinson's charting in a new countryTaiwan
- ✏️DAF Pro: Stutter & Parkinson's: app got smaller12 MB → 5 MB (-60%)
- 📦DAF Pro: Stutter & Parkinson's updated to version 4.11.0Updated for iOS 27
- 📈DAF Pro: Stutter & Parkinson's entered the top 100Top Paid · Medical · AU
- 📈DAF Pro: Stutter & Parkinson's entered the top 10Top Paid · Medical · GB
- 📈DAF Pro: Stutter & Parkinson's entered the top 10Top Paid · Medical · FR
- 📈DAF Pro: Stutter & Parkinson's entered the top 100Top Grossing · Medical · RU
- 📈DAF Pro: Stutter & Parkinson's entered the top 100Top Paid · Medical · DE
- 📈DAF Pro: Stutter & Parkinson's entered the top 10Top Paid · Medical · CN
- 📈DAF Pro: Stutter & Parkinson's entered the top 10Top Paid · Medical · JP
- 📈DAF Pro: Stutter & Parkinson's new best rank in the overall chart: #47Top Paid · All Apps · SA
- 📈DAF Pro: Stutter & Parkinson's entered the top 100 in 3 chartsTop Grossing · Medical · IT · Top Grossing · Medical · JP · Top Paid · All Apps · SA
- 📈DAF Pro: Stutter & Parkinson's new best rank in the overall chart: #104Top Paid · All Apps · IT
- 📈DAF Pro: Stutter & Parkinson's entered the top 10Top Paid · Medical · CA
- 📈DAF Pro: Stutter & Parkinson's entered the top 10Top Paid · Medical · SA
- 📈DAF Pro: Stutter & Parkinson's entered the top 100Top Grossing · Medical · SA
- 📈DAF Pro: Stutter & Parkinson's entered the top 10 in 2 chartsTop Paid · Medical · IT · Top Paid · Medical · KR
- 📈DAF Pro: Stutter & Parkinson's entered the top 100Top Grossing · Medical · KR
- 📈DAF Pro: Stutter & Parkinson's entered the top 10Top Paid · Medical · BR
- 📈DAF Pro: Stutter & Parkinson's charting in a new countryTurkey
- 📈DAF Pro: Stutter & Parkinson's entered the top 100 in 2 chartsTop Paid · Medical · BR · Top Paid · Medical · CA
- 🆕DAF Pro: Stutter & Parkinson's first spotted by AppInsider#29 in Top Paid · Medical · United Kingdom
- 📦DAF Pro: Stutter & Parkinson's version 4.10.0No release notes
- 🆕DAF Pro: Stutter & Parkinson's released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Medical PaidDAF Pro: Stutter & Parkinson's at a glance
AI summary written from our chart and store data, 2026-11-08. It can be wrong: check the numbers above.
DAF Pro is a one-time purchase medical utility that applies delayed auditory feedback to help people who stutter, those with Parkinson's disease, and speech therapists improve fluency and control speaking rate. The app demonstrates strong niche traction in Eastern European and Asian markets, ranking #6 in Russia and #15 in China for paid medical apps, while maintaining moderate visibility in Western regions like the US (#67).
Similar apps: Fluently: Stuttering Therapy, SpeechEasy, Lively
DAF Pro: Stutter & Parkinson's on the App Store
App details
App privacy Measured
DAF Pro: Stutter & Parkinson's’s App Store privacy label declares 0 data categories used to track you across other companies’ apps and websites, 0 linked to your identity and 2 collected anonymously.
As declared by the developer on the App Store — Apple requires every app to publish this label. We track changes over time.
DAF Pro: Stutter & Parkinson's downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Where DAF Pro: Stutter & Parkinson's's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
How this is calculated
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Brazil | MedicalPaid | #4 |
 United States | MedicalPaid | #32 |
 Japan | MedicalPaid | #20 |
 China | MedicalPaid | #30 |
 South Korea | MedicalPaid | #35 |
| United Kingdom | MedicalPaid | #52 |
 Germany | MedicalPaid | #46 |
 Russia | MedicalPaid | #26 |
| Russia | MedicalGrossing | #62 |
 India | MedicalPaid | #44 |
 France | MedicalPaid | #80 |
 Saudi Arabia | MedicalPaid | #48 |
 Italy | MedicalPaid | #89 |
 United Arab Emirates | MedicalPaid | #55 |
 Canada | MedicalPaid | #189 |
 Indonesia | MedicalPaid | #122 |
Apps near DAF Pro: Stutter & Parkinson's on the chart
Medical Paid, around #4.
Ratings
App Store, worldwide.
Review momentum
ⓘ How we measure thisReview momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
What users say about DAF Pro: Stutter & Parkinson's
From the 24 most recent App Store reviews in the US.
Users report significant improvements in speech fluency and confidence, often citing the app as a cost-effective alternative to expensive hardware. However, technical issues such as excessive Bluetooth latency, audio distortion during pitch changes, and occasional malfunctioning are frequent complaints.
Mixed but leaning positive (67% of recent reviews give 4–5 stars). People like it for its features and content, and being useful. The main complaints are about price and subscriptions, and crashes and bugs. Recent reviews are more negative than earlier ones.
What people like
- Features & content: “Thanks for this amazing tool!”
- Useful: “Great app, highly recommended”
- Ease of use: “App operation is straightforward and clean”
- Price & subscription: “I have researched several of the expensive items such as speech easy”
Common complaints
- Price & subscription: “Like you guys are charging people and not updating the app?”
- Crashes & bugs: “I have been using this app for a few months and now it is not working at all ( on both my iPad and iPhone)”
About DAF Pro: Stutter & Parkinson's
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 [email protected]
Latest updates
Store changes
What DAF Pro: Stutter & Parkinson's changed on its store page: name, icon, screenshots, price, size, languages, requirements.
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