Hi Marja,
Touch has always been difficult for manufacturers and software publishers. When the law first came in (1995 in the UK) the web had barely got going. So tech has lagged, and I have known many users use AT hardware, such as pointing devices, even head-pointers for those with upper limb disorders.
And I have always made the point to clients that this goes beyond disabilities and into the realm of special needs. For example, if you have high blood pressure, you may well have the shakes - making it difficult to hit a small target area. But you are not classified as disabled in law.
Anyway. Accessibility guidelines on mobile devices have improved, as has native functional support. Speech-to-text is getting there, but still has a way to go.
The book is really targeted at those for delivering apps, rather than end users.
Take care.
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