This android application implements Delayed Auditory Feedback technique, which is known to help people with stuttering to speak more fluently. The application works by recording the speech through your headset, applying this technique and playing the delayed audio back to you. Frequency Altered Feedback is not currently supported, but it will be soon.
According to the antivirus report, the app doesn't contain viruses or any kind of malware. Boostlabz.com is the developer of DAF Delayed Auditory Feedback that can be found in the Health & Fitness category. On Google Play, the tool is rated 4.3 by its users.
The latest update of the app was released on Oct 11, 2013 and this application has been installed by over 50K users. Get the free .apk setup package of DAF Delayed Auditory Feedback 1.4 and take a look at users' reviews on Droid Informer. The installer occupies 98 KB on disk.