Giving people the ability to be heard when they cannot speak

“Being heard is so close to being loved that for the average person, they are almost indistinguishable.” - David W. Augsburger

Vocable AAC allows those with conditions such as MS, stroke, ALS, or spinal cord injuries to communicate using an app that tracks head movements, without the need to spend tens of thousands of dollars on technology to do so.

Vocable project team with team mascot

The Vocable Story

Vocable AAC was borne of the personal experience of a WillowTree team member and ideated at an internal company innovation hour. In mid-2019, a loved one of a WillowTree designer suffered from paralysis, and quickly found that there was minimal software available to effectively and affordably communicate without speech.

In early 2020, 14 WillowTree team members began taking steps to address this problem with Vocable: a free head tracking app that individuals with conditions such as MS, stroke, ALS, or spinal cord injury can use to communicate with care providers and loved ones. The team of developers, designers, project managers, and researchers created a product roadmap with support and expertise from Duke University speech language pathologists. With a “mob programming” approach to the project, the team is able to quickly iterate and update the product based on feedback from the impacted community and healthcare professionals. As an open source project, anyone in the world can contribute to Vocable via Github.

As an organization dedicated to helping digital experts thrive and building applications that matter, WillowTree is proud to support the work of the Vocable team.


Support for iOS devices


  • iPhone X and higher


  • 2nd + 3rd gen iPad Pros

Support for Android devices


  • Google Nexus 5X and higher
  • All Google Pixel Devices
  • Moto G6
  • Moto One
  • Samsung Galaxy S7 and higher
  • Xperia XZ3 Tablets


  • Acer Chromebook Tab 10
  • LG G Pad 5 10.1 FHD
  • Samsung Galaxy Tab S3 and higher
  • Samsung Galaxy Tab S5e
  • Samsung Galaxy Tab S6
  • Samsung Galaxy Tab Active Pro
See all supported devices

Reach out to give feedback on the app or to chat with our developers.

Contribute on GitHub