CHALLENGE
7-Day Read-Aloud Challenge
Read one guided passage aloud a day for 7 days, with a pace target you set. A practice tool, not a treatment.
DAF Stutter & Fluency Practice
Delayed auditory feedback tool
Only for iPhone
$4.99 · Designed for iPhone. Not verified for macOS.
iPhone
A daily reading practice with delayed and pitch-shifted feedback: guided passages, your live pace against a target, and a log of minutes. A practice tool, offline.
A daily speaking practice for people who stutter: read a passage aloud at a steady pace while you hear your own voice a fraction of a second late. Many people find that small delay makes speech easier to control.
Something to read, a pace to hold, the right feedback for each situation and a record of every session.
GUIDED READING
24 passages written for the app, in three levels: short sentences, paragraphs and a two-minute talk. A teleprompter scrolls at your target pace, from 80 to 180 words per minute, with the feedback running underneath. Turn on Measure my pace to see your live speaking rate against the target, worked out by speech recognition on the phone; where that is not available for your language, the app estimates it and labels it approximate. At the end you get your time, your average pace and a quick "How did that feel?" rating. You can also practice without a passage.
DELAY AND PITCH SHIFT
Delayed auditory feedback (DAF) from 0 to 250 ms; most people start around 50 to 100 ms. Frequency-altered feedback (FAF) shifts the pitch of the voice you hear by up to 12 semitones, on its own or together with the delay. Save named presets for each situation, such as Reading aloud, Phone call or Presentation, each with its own delay and shift, and start one from Shortcuts or Siri.
A ROUTINE YOU CAN KEEP
Set a daily goal, 10 minutes to begin with. The home screen shows today's minutes and how many days you practiced this week, with no streaks to feel guilty about. Progress shows minutes per week, your pace over time and your own ratings. Export a practice summary as PDF or CSV to share with your speech-language pathologist.
HEADPHONES
The app shows where the sound is going and will not start on the loudspeaker, where the microphone would pick up the playback and howl. Wired headphones give the shortest delay; Bluetooth adds some of its own.
PRIVATE
Your voice passes through memory to reach your headphones. It is never recorded, saved or uploaded, and pace is measured on the phone. The log keeps minutes, settings and ratings, never audio. Practice works offline; the only part that goes online is the feedback form, when you choose to send a message. No account.
WHAT IT IS NOT
It is a practice tool, not a treatment. It does not diagnose, treat or cure anything, and results vary a great deal from person to person. If speech is affecting your life, work with a qualified speech-language pathologist: DAF is most useful alongside professional guidance, not instead of it. Headphones required.
Events
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Small improvements, and links from the App Store now open your daily passage directly.
The developer, Yaniv van der Stigchel, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Yaniv van der Stigchel
- Size
- 4.4 MB
- Category
- Medical
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 4 more
- English, German, Italian, Japanese, Portuguese
- Age Rating
4+
- 4+
- Copyright
- © 2026 Yaniv Vanderstigchel
