DAF Pro: StutteringStammering for iPhone

Product summary

DAF Pro — Stuttering & Stammering is a Delayed Auditory Feedback (DAF) application from Speechtools Ltd designed to help people who stutter and those with neurological speech conditions (for example, Parkinson’s disease). The app delivers low-latency auditory feedback to encourage a slower, clearer speaking rate and is built and trialed by a practicing, certified Speech and Language Therapist.

How the app helps

Delayed auditory feedback works by changing the sound the speaker hears of their own voice, which can interrupt habitual speech patterns and promote a steadier pace. Clinical evidence indicates that DAF produces measurable improvement for a portion of users with stuttering or Parkinsonian speech symptoms.

Features and advantages

• Low-latency feedback even when the app runs in the background, helping maintain consistent therapy during everyday use.
• Built by a qualified speech and language therapist and tested in practice to meet professional needs.
• Intuitive user interface that makes session setup and adjustments straightforward.
• Designed specifically to support clarity and pace rather than replace formal therapy.

Compatibility and important limitations

• Works on iPhone and supports Bluetooth headsets; note that Bluetooth can introduce roughly an extra 60 ms delay to the feedback signal.
• Not available for use during phone calls and cannot run simultaneously with other media apps that also use audio.
• Intended as an assistive tool to complement, not substitute, individualized therapy when required.

Privacy and compliance

DAF Pro is GDPR-compliant and requests user permission before any data collection. The app emphasizes user privacy and handles any telemetry or usage data only after explicit consent.

Help and feedback

If you have questions, need assistance, or want to share feedback, please use the app’s in-app support/contact option or reach out to Speechtools Ltd through their official support channels available on their website.

Alternative option

If you’re exploring other free tools, consider a simple time-and-date display app (often listed as a free calendar/clock utility) as an adjunct for cueing practice sessions.