# DAF Pro vs Speech Sounds Visualized

The clearest difference is price: Speech Sounds Visualized at Free against DAF Pro's $5.99. Speech Sounds Visualized also leads on iOS requirement (13.0 vs 17.0). DAF Pro's advantage is in-app purchases (none vs 3) and update cadence (every 3 weeks vs every 4 months). On rating, ratings volume, ads and device support there is nothing between them.

Speech Sounds Visualized is free to download; DAF Pro costs $5.99 up front. Speech Sounds Visualized sells 3 in-app purchases, starting at $2.99 per month. DAF Pro asks for nothing beyond the download.

DAF Pro holds the better App Store score, 4.5 against 4.3. Both are backed by a comparable volume of ratings — 97 and 134 respectively. Written reviews point the same way: 63% of DAF Pro's written reviews are positive against 47% of Speech Sounds Visualized's.

DAF Pro ships an update every 3 weeks, Speech Sounds Visualized every 4 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | DAF Pro | Speech Sounds Visualized |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Rating | **[4.5 (97 ratings)](https://appshunter.io/ios/app/daf-pro-stutter-and-parkinsons/id491299921/reviews)** | [4.3 (134 ratings)](https://appshunter.io/ios/app/speech-sounds-visualized/id1300151606/reviews) |
| Number of ratings | 97 | **134** |
| Positive reviews | **62.7% of reviews** | 46.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 months |
| Monetization | **Paid** | Subscription |
| Best chart rank | **#111** | — |
| Size | 5 MB | 448 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Speechtools Ltd](https://appshunter.io/developer/940679564) | [Pullman Regional Hospital](https://appshunter.io/developer/1300151605) |

## What reviewers say

### DAF Pro

[App page](https://appshunter.io/ios/app/daf-pro-stutter-and-parkinsons/id491299921)

**Currently charting:** #111 Top Paid · Medical (US App Store)

This app uses delayed auditory feedback to help individuals who stutter or have Parkinson's speak more fluently. By hearing your voice with a slight delay, it naturally slows your speech rate, improving clarity and smoothness. It's designed for personal use and speech therapy sessions.

**Highlights:** Adjustable delay and pitch shift, Low latency audio, Background operation, Speech recording and playback, Wired and Bluetooth headset support

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Speech Sounds Visualized

[App page](https://appshunter.io/ios/app/speech-sounds-visualized/id1300151606)

Visualize English speech sounds with x-ray videos and 3D animations. Learn pronunciation and articulation with detailed instructions and practice exercises. Includes recording and slow-motion features for enhanced learning.

**Highlights:** X-ray videos of sound formation, 3D animations for all sounds, Organized by sound type (consonants, vowels, R-combinations), Written instructions from a Speech Language Pathologist, Recording capability (sound, word, sentence), Slow motion and zoom features, No advertisements

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $2.99 | per month |
| Annual Subscription | $29.99 | per year |
| R-Sound Combinations | $0.99 | one-time |


## Frequently asked questions

### Is DAF Pro free?

DAF Pro costs $5.99, with no in-app purchases.

### Is Speech Sounds Visualized free?

Speech Sounds Visualized is free to download, with in-app purchases available.

### Which has better reviews, DAF Pro or Speech Sounds Visualized?

DAF Pro is rated higher. DAF Pro averages 4.5 out of 5 from 97 ratings, while Speech Sounds Visualized averages 4.3 from 134 ratings.

### Do DAF Pro or Speech Sounds Visualized have ads?

Neither DAF Pro nor Speech Sounds Visualized shows ads.

### Which is updated more often, DAF Pro or Speech Sounds Visualized?

DAF Pro ships an update every 3 weeks, and Speech Sounds Visualized every 4 months. Most recently, DAF Pro was updated on November 1, 2026 and Speech Sounds Visualized on November 2, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*