Text-to-speech AAC app

Predictable is designed for people who are literate but have lost the ability to speak possibly due to cerebral palsy, motor neurone disease (ALS), laryngectomy, stroke, apraxia or brain injury.

Latest word prediction technology

Featuring a world-class software which learns from your patterns of use and thereby predicts what you will type next in your message easily and accurately.

Predictable makes typing (in both American and British English) accurate and speedy.

Head tracking and Gesture Speak

Predictable offers an enhanced head tracking feature using face recognition technology available on newer iPad Pro devices.


Face gestures are also compatible with scanning methods: you can scan the items with switches and select by blinking.

Other alternative access methods

  • time and force delay to prevent mis-hits and accommodate tremor or other motor difficulties

  • switch scanning access - use one or two switches via a Bluetooth switch box and the on-screen scanning

  • touch anywhere - use the screen as a switch

Phrase bank and grid view

Predictable now offers the possibility to use the phrase bank in a grid-view. You can customise your phrase bank content and the size of the grid.

Manage your phrase bank from the web platform

Log in with your Predictable user details and customise your phrase bank content.


Take the online training to get familiar with all the features. 

Avoid interruptions

Predictable can automatically speak prepared sentences while you type your message. This lets people know you're speaking and helps prevent interruptions. You can save as many of these messages as you like and Predictable will rotate through them so that you don’t repeat yourself. They can also be played at the touch of a button.

Voice options

Use Acapela's my-own-voice or ModelTalker to generate your personalised synthetic voice! Acapela my-own-voice and ModelTalker generates synthetic versions of users’ voices through sophisticated softwares.

Users can record sentences to generate the version of the voice they would like. The selected voice is then able to be downloaded and used within Predictable.

You can also choose among your device wide range of voices! 

“The thing that you’ve made is going to help me so much. I am so happy to be here and to have the opportunity to thank you. Thank you so SO much for having done something that will make my life so much easier.” 

Rick, using Predictable

And get your hardware repaired or replaced within 48 hours and unlimited support over phone and email.

  • Purchase a two-year guarantee

We agree on a time and date, a member of Therapy Box team comes to you if you live in the UK, or calls you on Skype and run you through the app to make sure you end up knowing it like an expert.

  • Book your personal training session

Which includes device(s), the app pre-installed ready to use and accessories that you may need depending on your needs.

  • Purchase a bundle 

Many ways to get Predictable

If you already have a device, you can also buy the app from the App Store or Google Play Store.


Apple, the Apple logo, iPhone and iPad are trademarks of Apple Inc., registered in the U.S. and other countries. App Store is a service mark of Apple Inc.

Therapy Box, Predictable, ChatAble & Scene and Heard are registered trademarks of Therapy Box Limited. Copyright © 2020 Therapy Box Limited. All rights reserved.

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