The easiest, cheapest and most advanced way to track your %SS (Percentage of stuttered syllables).

The Disfluency Index Counter app allows Speech and Language Therapists to perform a live count of the number of fluent or disfluent syllables. This application comes with two styles of counters: A simple and an advanced counter.

The simple version of the Disfluency Index Counter uses two simple buttons that record the amount of times the SLP pushes the buttons.

There is an "F" button for a Fluency Syllable & and a "D" button for a disfluent/stuttered syllable. A live track of the total number of syllables recorded is shown on the main screen as well as the number of fluent and disfluent syllables/words entered.

Once you are finished with your data collection you press "Done" to see the results. Disfluency Index Counter provides the following results:

1. Total number of words/syllables:
2. Number of fluent words/syllables:
3. Number of disfluent words/syllables:
4. The percentage of fluent words/syllables:
4. The percentage of disfluent words/syllables.

The advanced counter allows therapists to specifically identify the types of disfluencies exhibited by the client. The SLP can choose from Block, Prolongation or Repetition.

Speech Therapists can easily e-mail or print the results to themselves.
It saves you time and makes figuring out the % of stuttered syllables a lot easier- we do it for you!

What's New

Version 5.1

We have added the option to select a language: English, Spanish and Portuguese

Ratings and Reviews

So far, so good!


Pediatric SLP (preschool and lower elementary). I just found this app and really like it! I have used it while listening to recordings, and really like the "report" given at the end. I wish I could email the report in the colorful format as well as the black and white. I like that I can use the simple or advanced format, the email capability, and the ability to send results to the Therapy Center app.



I really think this app is great, but please allow the user to input the client's name. Right now there is no way to determine progress from past data and current data, not even with the TRC. I have several fluency clients and this additional information would be invaluable. Thank you for great apps and for your consideration in this matter.

Developer Response

Thank you for such great feedback. We will consider doing this on our next update.
The Smarty Ears Team

Great tallying for SSI


I used the camera app on my iphone to video my patients who stutter. When it comes to tallying their disfluencies for the ipad, I used both devices at the same time. It was super easy, and the percentage is calculated at the bottom. Very easy.


Smarty Ears, LLC
11.4 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© All rights reserved to Smarty Ears, LLC


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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