Dr. Gary Brown's Autism/DTT Letters app uses Discrete Trial Training (DTT) to help your child learn the letters of the alphabet (A-Z) and to learn the difference between uppercase and lowercase letters. The letters can be viewed in a simple sans-serif font, serif font, handwritten print font, a cursive font and with several other new card sets. The app also includes the letters in American Sign Language. This app has been tested extensively in Dr. Brown's clinic with children who have autism, ADHD, and other developmental disorders.

DTT is not a children's game. It is a therapy based on years of scientific research. DTT is the primary teaching method used in Applied Behavior Analysis (ABA) to teach numerous pre-academic and social skills to children with autism. This app can be used to help teach the letters of the alphabet to children with autism, attention deficit disorder (ADD), attention deficit hyperactive disorder (ADHD), or any child who has trouble staying on task.

Finding the right therapy for a child with autism can be overwhelming. Only Applied Behavior Analysis (ABA) has years of scientific research proving it's effectiveness and is recommended by The National Institute of Mental Health and the Surgeon General. But caregivers quickly learn that well-trained therapists in ABA are expensive and hard to find. During my forty years of clinical experience as a Licensed Psychologist I have tried to provide low-cost ABA resources for caregivers so they can do their own ABA. ABA and DTT increases your child's likelihood of being mainstreamed, increases happiness, and gives you hope.

Be sure to check out our other apps:
* Autism/DTT Colors
* Autism/DTT Shapes
* Autism/DTT Numbers
* Autism/DTT Site Words
* Autism/DTT Animals
* Autism/DTT People
* Autism DX/Treatment
* DTT Pro

What’s New

Version 1.4.8

Updated for iOS8 and iPhone 6 and iPhone 6 Plus devices.

Ratings and Reviews

4.7 out of 5
3 Ratings

3 Ratings

njschool ,

Love it!

Discrete Trial Training (DTT) Letters is a great app to utilize while teaching receptive letter identification. DTT is the primary teaching method used in Applied Behavior Analysis to teach multiple skills to children with autism, so this is a great tool to support teaching. This app is customizable with the ability to choose correct and incorrect letter cards the child is learning, allowing the target letters to be randomized. Upper or lower case letters can be chosen, as well as a variety of fonts and styles. DTT Letters also allows the instructor to change the number of stimuli in a field and it offers pictures of the American Sign Language letters. One of the most helpful things about this app is that it has the ability to track and record student progress. This log provides individual student records broken down by date, shows the letters that were presented for each trial, and the number of cards in a field. The DTT Letters app is a great way to keep students motivated and engaged while learning their letters!

Autismcare ,


Great app! Wish I could add more names so that I can review data for each student. Is that possible in your next update. Six children would be perfect for most teachers! A must have app for a special education k-2 class!

Slurpeegirl ,

Great app!

This is much easier than having flashcards! I like all the choices that can be made as to how I want the program to work. Great app for teaching any child, special needs or not!


Bob Bradley
19.8 MB

Requires iOS 8.1 or later. Compatible with iPhone, iPad, and iPod touch.


English, Simplified Chinese

Age Rating
Rated 4+
© 2011 - 2015 Dr. Brown's Apps


  • Family Sharing

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

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