grommet, Check out this chat app for the iPad called Assistive Chat, & see if this is something you could use. It may work on other smart tablets but I'm not sure. The app costs $24.99.
Separately,
kestrel mentioned using a similar type app for her son, on her smart phone, when they had a school meeting awhile back. Maybe you can ask her directly for a recommendation.
Anyway, I hope this helps.
Assistive Apps presents
Assistive Chat, an affordable Augmentative Alternative Communication (AAC) Device, catered to people with difficulty in speech. The biggest challenge for such users when using AAC devices is the number of key strokes or hits required to construct any sentences, which can take up a significant amount of time to have a decent conversation with anyone. To overcome this challenge, Assistive Chat is designed to be simple and efficient, allowing users to communicate at the fastest rate possible, with natural sounding voices.
Features:
- Landscape and Portrait Modes to cater to different needs
- Word Prediction to minimize the keystrokes required
- Adaptive learning of new vocabulary into the word prediction list
- Favorites list for users to save commonly used sentences
- 3 voices included for user to pick
- Adjustable volume and speed for voices
- Large font and buttons for easy access
- Recent list for quick access to previously spoken sentences