DAF Delayed Auditory Feedback App Icon

DAF Delayed Auditory Feedback

Entertainment • Junichiro Seyama
12+ v1.2.2 Recorded price: Free App Store →
★★★★★
★★★★★
(6 App Store ratings)
🏆 Best: #44 Free (HKG)
IPA Analysis
Technical Specs
Bundle ID jp.softbank.i-jseyama.DAF
Version 1.2.2
App Store Size 4.97 MB
Minimum iOS 15.0
Devices iPhone, iPad, iPod touch
Catalog release date 2013-03-12
Latest recorded version date 2025-12-14
Features & Support
Advisory 12+
Infrequent/Mild Medical/Treatment Information
Languages (2)
EN, JA
Top In App Purchases
No In App Purchases Listed

Preview

DAF Delayed Auditory Feedback screenshot 1

Description

Try saying "toy boat" repeatedly. It's hard to say, right? There are many words like this, and if you have to use them during an important presentation, it can be quite stressful. But with this app, "toy boat" becomes... **Hugely** difficult to say. If you thought, "Wait, shouldn't it make it easier to say?" you're wrong. It really becomes **hugely** difficult to say. This is a "who benefits from this?" kind of app. What this app does is simple. It picks up your voice through the microphone and plays it back through the headphones (or earphones) with a slight delay. That's all it does. This simple process is called Delayed Auditory Feedback, or DAF for short. DAF is known to have interesting effects. It makes it difficult to speak. So, the already difficult "toy boat" becomes **hugely** difficult to say with DAF. This might seem like a "who benefits from this?" kind of thing, but it's a very interesting phenomenon from a cognitive psychology perspective. Also, DAF doesn't always make speech difficult; the extent of the disruption varies depending on the amount of delay and the way you speak. This app is a simple psychological experiment tool that allows you to test when DAF's effects are most pronounced using yourself as the subject. Experiment with different scenarios using "toy boat" as the keyword. **Important** When using this app, you must have headphones (or earphones) with a microphone. You cannot substitute the device's built-in microphone and speakers. I'll say it again. You cannot substitute the device's built-in microphone and speakers. **Warning** DAF creates a speech situation different from normal. It is possible that this may cause some stress to your mind and body. We cannot take any responsibility for any issues that arise from using this app. Please understand the principles of DAF fully and use this app at your own risk. If you feel any abnormalities in your mind or body, stop using the app immediately. Additionally, we do not recommend letting minors, especially young children, experience DAF. **Effect on Stuttering** There are reports that DAF has improved stuttering. However, this app was developed purely as a simple psychological experiment tool to examine how DAF affects the speech of non-stutterers from a cognitive psychology perspective.

What's New

Version 1.2.2 2025-12-14
Minor fixes.

Technical Analysis

Package Overview Basic metadata
Bundle ID jp.softbank.i-jseyama.DAF
Current Version 1.2.2
Minimum iOS 15.0
Package Size App Store Size
Package Metadata 0 / 14 version records
1.8 / 5.0 (5 ratings)
Detailed binary, privacy manifest, framework, and Info.plist results have not been indexed for this package yet. The verified App Store and archive metadata above remains available.

Developer Information

Known Version Records

0 version records with stored package metadata • 14 known version records

Stored metadata does not guarantee a package is currently available to download.

Details Version / IDs Version date Action
DAF Delayed Auditory Feedback icon
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App Store ID: 867459074 Unknown Request Version
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App Store ID: 867389587 Unknown Request Version
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App Store ID: 866833702 Unknown Request Version
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App Store ID: 831286047 Unknown Request Version
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App Store ID: 829677062 Unknown Request Version
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App Store ID: 828874743 Unknown Request Version
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App Store ID: 828481966 Unknown Request Version
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App Store ID: 828402224 Unknown Request Version
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App Store ID: 826098265 Unknown Request Version
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App Store ID: 820402061 Unknown Request Version
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App Store ID: 820273078 Unknown Request Version
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App Store ID: 808512715 Unknown Request Version
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App Store ID: 15553691 Unknown Request Version
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App Store ID: 14292904 Unknown Request Version