qb DAF Downloads & Revenueqb DAF - Stuttering Speech Aid · App Store
qb DAF - Stuttering Speech Aid is #27 in Medical Paid in China and charting in 2 of 30 countries we track.
Updated 9 Nov 2026 · rankings refresh through the day
DeveloperGiuseppe Di Cienzo
CategoryMedical
Price1.99 GBP
Released
Rating★ 5.0 (1)
Version1.3
Age rating17+
First seen by us
24 Sep 2026
24 Sep 2026Installs (est.)500+ worldwide
qb DAF - Stuttering Speech Aid update history & changes
Last change · 13 events since 12 May 2021Full timeline ↓📈Entered the top 100📈Charting in a new country🆕First spotted by AppInsider📦Version 1.3🆕Released on the App Store
Full timeline · 13 events
- 📈qb DAF - Stuttering Speech Aid entered the top 100Top Paid · Medical · CN
- 📈qb DAF - Stuttering Speech Aid charting in a new countryChina
- 📈qb DAF - Stuttering Speech Aid entered the top 10Top Paid · Medical · FR
- 📈qb DAF - Stuttering Speech Aid charting in a new countryFrance
- 📈qb DAF - Stuttering Speech Aid charting in a new countryUnited States
- 📈qb DAF - Stuttering Speech Aid entered the top 100Top Paid · Medical · BR
- 📈qb DAF - Stuttering Speech Aid charting in a new countryBrazil
- 📈qb DAF - Stuttering Speech Aid entered the top 100Top Paid · Medical · GB
- 📈qb DAF - Stuttering Speech Aid charting in a new countryUnited Kingdom
- 📈qb DAF - Stuttering Speech Aid charting in a new countrySouth Korea
- 🆕qb DAF - Stuttering Speech Aid first spotted by AppInsider#44 in Top Paid · Medical · Canada
- 📦qb DAF - Stuttering Speech Aid version 1.3A big update for qb DAF!
• The waves now follow your real voice as you speak
• Delay range extended up to 200 ms (in 25 ms steps)
• Change the delay live, without stopping playback
• New warning when using Bluetooth headphones, which add extra latency
• Safer by design: the app now starts only with headphones connected, and stops automatically if they disconnect or a call comes in
• Completely rebuilt audio engine for rock-solid start/stop reliability
• Refreshed for the latest iPhones and iOS versions… more - 🆕qb DAF - Stuttering Speech Aid released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
5.0 ★
1 ratings
Measured
Best rank now
#27
Medical PaidMeasured
qb DAF - Stuttering Speech Aid on the App Store
App details
App ID
1565802634
Publisher
Giuseppe Di Cienzo
On the store since
May 2021
5 years on the store
Minimum OS
iOS 16.0+
iPhone 8 and later
Devices
iPhone · iPad
Universal purchase
Content rating
17+
1 content note below
Languages
12
EN FR DE HE ID IT JA KO RU ZH ES TR
Size
23 MB
Also listed in
Health & Fitness
Content notesUnrestricted Web Access
App privacy Measured
qb DAF - Stuttering Speech Aid declares it collects no data at all — the rarest and most private label on the App Store.
Declared label
Data Not Collected
As declared by the developer on the App Store — Apple requires every app to publish this label. We track changes over time.
qb DAF - Stuttering Speech Aid downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. App Store downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| China | MedicalPaid | #27 |
 South Korea | MedicalPaid | #129 |
Apps near qb DAF - Stuttering Speech Aid on the chart
Medical Paid, around #27.
Ratings
App Store, worldwide.
Rating
5.0 ★
1 ratings
Measured
Ratings
1
Measured
What users say about qb DAF - Stuttering Speech Aid
From recent reviews.
About qb DAF - Stuttering Speech Aid
Hear your voice differently. Speak more fluently.
qb DAF brings Delayed Auditory Feedback — a technique used by speech-language pathologists for decades — to your pocket. Put on your headphones, press Start, and hear your own voice played back with a slight delay. For many people who stutter, this simple change is enough to noticeably improve fluency and slow down speech naturally.
HOW IT WORKS
Delayed Auditory Feedback (DAF) alters the way you hear yourself while speaking. By delaying your voice by a fraction of a second, it encourages slower, more deliberate speech and can reduce stuttering for many users. DAF is also used to practice pacing in everyday conversation, public speaking, and reading aloud.
FEATURES
• Real-time voice feedback with no recording — your voice goes straight from the microphone to your headphones
• Adjustable delay from 25 to 200 ms, in simple 25 ms steps
• Change the delay live, while you speak, and feel the difference instantly
• Sound waves on screen follow your real voice
• Works in the background and with the screen locked — keep practicing while reading or walking
• Safe by design: starts only with headphones connected, and stops automatically if they disconnect or a call comes in
• Clear warning when Bluetooth headphones add extra latency (wired headphones give the most accurate timing)
• No account, no ads, no tracking. Completely free.
PRIVACY FIRST
Your voice is never recorded, saved, or sent anywhere. All audio is processed in real time on your device and disappears the moment you hear it. qb DAF collects no data at all.
GETTING STARTED
1. Connect your headphones (wired recommended)
2. Choose your delay — most people start around 50–100 ms
3. Press Start and speak
qb DAF is a self-practice tool and is not a medical device. It does not replace professional advice from a speech-language pathologist.
qb DAF brings Delayed Auditory Feedback — a technique used by speech-language pathologists for decades — to your pocket. Put on your headphones, press Start, and hear your own voice played back with a slight delay. For many people who stutter, this simple change is enough to noticeably improve fluency and slow down speech naturally.
HOW IT WORKS
Delayed Auditory Feedback (DAF) alters the way you hear yourself while speaking. By delaying your voice by a fraction of a second, it encourages slower, more deliberate speech and can reduce stuttering for many users. DAF is also used to practice pacing in everyday conversation, public speaking, and reading aloud.
FEATURES
• Real-time voice feedback with no recording — your voice goes straight from the microphone to your headphones
• Adjustable delay from 25 to 200 ms, in simple 25 ms steps
• Change the delay live, while you speak, and feel the difference instantly
• Sound waves on screen follow your real voice
• Works in the background and with the screen locked — keep practicing while reading or walking
• Safe by design: starts only with headphones connected, and stops automatically if they disconnect or a call comes in
• Clear warning when Bluetooth headphones add extra latency (wired headphones give the most accurate timing)
• No account, no ads, no tracking. Completely free.
PRIVACY FIRST
Your voice is never recorded, saved, or sent anywhere. All audio is processed in real time on your device and disappears the moment you hear it. qb DAF collects no data at all.
GETTING STARTED
1. Connect your headphones (wired recommended)
2. Choose your delay — most people start around 50–100 ms
3. Press Start and speak
qb DAF is a self-practice tool and is not a medical device. It does not replace professional advice from a speech-language pathologist.
Latest updates
1.3
A big update for qb DAF!
• The waves now follow your real voice as you speak
• Delay range extended up to 200 ms (in 25 ms steps)
• Change the delay live, without stopping playback
• New warning when using Bluetooth headphones, which add extra latency
• Safer by design: the app now starts only with headphones connected, and stops automatically if they disconnect or a call comes in
• Completely rebuilt audio engine for rock-solid start/stop reliability
• Refreshed for the latest iPhones and iOS versions
