Predictable, a multi-award winning Augmentative and Alternative Communication (AAC) text-to-speech app.

Designed for people who cannot speak because of conditions such as:
- Autism
- Cerebral Palsy
- Down’s syndrome
- Learning difficulties
- Stroke / Aphasia
- Laryngectomy
- Apraxia

Using a smart word prediction technology, the app makes speaking out a text-based message easy.
The software learns from your patterns of use and predicts what you will type next in your message easily and accurately.

Categories, in Predictable, make it possible to save your frequently used phrases or sentences and easily retrieve them when you want to speak them.

No WiFi needed to use most the app (only needed to backup your account data).

Main features:
Compatible with the iOS voices,
Use your voice-banked voice from ModelTalker or Acapela My-own-voice
Change the rate and pitch of the iOS voices

Switch Access: accessible via Bluetooth switch box + switch/es (compatible with Therapy Box Switch Box and RJ Cooper Switch Interface)
Face switch: Use face gestures to trigger a selection
Compatible with the iOS method of scanning
Configurable settings for auto or user scan
Touch Anywhere: use the whole screen as a switch with scanning
Head tracking: use facial recognition to interact with the app (available on Pro devices only)
New selection triggers: blink, smile, frown, etc. to select items on the screen
Scan & Tracking: combine different progression and selection access methods

Predictable 6 offers a large selection of customisable emojis.
Attach recordings to your emojis

Phrase bank
Link your phrases in categories to YouTube videos, iTunes songs or website URLs

Web platform
Manage your phrase bank content from the web platform
The phrase bank content is now compatible with format

Different keyboard options to choose from (10 Key, QWERTY, ABCD, High Frequency, Apple and any other Bluetooth or downloadable keyboard).
Ultra customisable UI
Use the notepad for on-screen handwriting that works with the word prediction
Customise your Predictable appearance by changing font, colours and other settings
High Contrast option
Ability to increase the size of the word prediction text

Customer Support
User guides available on your app, on Therapy Box website and upon request
Send a support request directly from your app
Call us up with any queries or problems
Short tutorial videos available from the app
Take the web training on Therapy Box website and get certified!
Join Therapy Box Facebook community to get help from other users

You can find more information about Predictable at

What’s New

Version 6.0.9

New user interface
Grid view
Emoji keyboard
Enhanced Head Tracking settings
More speech interactions
Face switch: Use face gestures to trigger a selection
Calling functionality: you can now make phone/Skype/Whatsapp calls using Predictable
Force and time delay reintroduced!
You can now have two devices logged on at the same time

Ratings and Reviews

4.5 out of 5
89 Ratings

89 Ratings


Great AAC solution, responsive team

I found this app to be a great solution for individuals who communicate primarily through typing. The interface is intuitive and offers some nice customizable options. It allows for preprogrammed messages for efficiency when necessary. The developers have been supportive and very responsive to questions.

Developer Response ,

Hi Kate,
Thanks for leaving a positive review with feedback on the features that you find helpful. I will pass on your comments to the team.

Paul 12261 ,

Thank you Predictable

Thank you Predictable
now am able to interact with people with ease and I am happy to speak to my grand children again

Developer Response ,

Hi Paul,
Thanks for leaving such lovely feedback. We know how important being able to speak with family is - so if Predictable has helped with this, then we are so pleased - Rebecca

Bruce UCPSD ,

Worth the cost

The number of apps for Augmentative and Alternative Communication has exploded, but the quality of most of the free and low-cost apps is a big problem. I work at a regional Assistive Technology Center where people come for assistance in considering AT to help with their particular physical or speech/language challenge. For a literate young or older adult, Predictable is by far the best text-to-speech app available. You get what you pay for, and in Predictable, it has solid performance, an easy to learn interface, and useful settings to costomize and make it fit particular needs. When I've had questions, their tech support has been responsive and thorough. I'm not paid by the company, but actually, if I could, I'd love to work for them. Their product rocks, and it's made a postive impact in the lives of people I work with.


Therapy Box Limited
721.3 MB

Requires iOS 10.0 or later. Compatible with iPhone 5S, iPhone 6, iPhone 6 Plus, iPhone 6S, iPhone 6S Plus, iPhone SE (1st generation), iPhone 7, iPhone 7 Plus, iPhone 8, iPhone 8 Plus, iPhone X, iPhone XS, iPhone XS Max, iPhone XR, iPhone 11, iPhone 11 Pro, iPhone 11 Pro Max, iPhone SE (2nd generation), iPad Air, iPad Air Wi‑Fi + Cellular, iPad mini 2, iPad mini 2 Wi‑Fi + Cellular, iPad Air 2, iPad Air 2 Wi‑Fi + Cellular, iPad mini 3, iPad mini 3 Wi‑Fi + Cellular, iPad mini 4, iPad mini 4 Wi‑Fi + Cellular, iPad Pro (12.9‑inch), iPad Pro (12.9‑inch) Wi-Fi + Cellular, iPad Pro (9.7‑inch), iPad Pro (9.7‑inch) Wi‑Fi + Cellular, iPad (5th generation), iPad (5th generation) Wi‑Fi + Cellular, iPad Pro (12.9‑inch) (2nd generation), iPad Pro (12.9‑inch) (2nd generation) Wi‑Fi + Cellular, iPad Pro (10.5‑inch), iPad Pro (10.5‑inch) Wi‑Fi + Cellular, iPad (6th generation), iPad (6th generation) Wi‑Fi + Cellular, iPad Pro (11‑inch), iPad Pro (11‑inch) Wi‑Fi + Cellular, iPad Pro (12.9‑inch) (3rd generation), iPad Pro (12.9‑inch) (3rd generation) Wi‑Fi + Cellular, iPad mini (5th generation), iPad mini (5th generation) Wi‑Fi + Cellular, iPad Air (3rd generation), iPad Air (3rd generation) Wi‑Fi + Cellular, iPad (7th generation), iPad (7th generation) Wi‑Fi + Cellular, iPad Pro (11‑inch) (2nd generation), iPad Pro (11‑inch) (2nd generation) Wi‑Fi + Cellular, iPad Pro (12.9‑inch) (4th generation), iPad Pro (12.9‑inch) (4th generation) Wi‑Fi + Cellular, and iPod touch.


English, French

Age Rating


  • Family Sharing

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

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