# DAF Delayed Auditory Feedback vs Speech Jammer

The clearest difference is in-app purchases: DAF Delayed Auditory Feedback at none against Speech Jammer's 3. DAF Delayed Auditory Feedback also leads on iOS requirement (15.0 vs 17.0). Speech Jammer's advantage is update cadence (monthly vs every 6 months). On price, ads and device support there is nothing between them.

Both are free to download. Speech Jammer sells 3 in-app purchases, starting at $2.99 per month. DAF Delayed Auditory Feedback asks for nothing beyond the download.

DAF Delayed Auditory Feedback ships an update every 6 months, Speech Jammer monthly. The most recent releases landed on September 11, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | DAF Delayed Auditory Feedback | Speech Jammer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.3 (6 ratings)](https://appshunter.io/ios/app/daf-delayed-auditory-feedback/id606979390/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 6 months | **Monthly** |
| Monetization | Ad-supported | — |
| Size | 5 MB | 5 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Junichiro Seyama](https://appshunter.io/developer/537815782) | [BULPARA TEKNOLOJI LIMITED SIRKETI](https://appshunter.io/developer/1552593177) |

## What reviewers say

### DAF Delayed Auditory Feedback

[App page](https://appshunter.io/ios/app/daf-delayed-auditory-feedback/id606979390)

This app uses delayed auditory feedback to make speaking difficult by playing your voice back through headphones with a slight delay. It's a tool for psychological experiments, allowing users to test the effects of DAF on their own speech.

**Highlights:** Delayed auditory feedback simulation, Voice input via microphone, Audio output through headphones, Psychological experiment tool, Adjustable delay effects, Speech disruption testing

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

**In-app purchases:** none


### Speech Jammer

[App page](https://appshunter.io/ios/app/speech-jammer-voice-delay/id6761292332)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Speech Jammer Monthly | $2.99 | per month |
| Speech Jammer Pro | $4.99 | per 7 days |
| Speech Jammer Annual | $19.99 | per year |


## Frequently asked questions

### Is DAF Delayed Auditory Feedback free?

DAF Delayed Auditory Feedback is free to download, with no in-app purchases.

### Is Speech Jammer free?

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

### Do DAF Delayed Auditory Feedback or Speech Jammer have ads?

Both DAF Delayed Auditory Feedback and Speech Jammer show ads.

### Which is updated more often, DAF Delayed Auditory Feedback or Speech Jammer?

DAF Delayed Auditory Feedback ships an update every 6 months, and Speech Jammer monthly. Most recently, DAF Delayed Auditory Feedback was updated on September 11, 2026 and Speech Jammer on September 8, 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.*