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If you are communicating with an Apple iPad/iPhone touch screen device they will have switched VoiceOver on. This radically changes the user interface from "tap"=do and "swipe"=move etc., to "tap once" = announce what has been touched, "tap twice"=do, one finger swipe does nothing so you can explore the screen by moving your finger over it, and lots of extra gestures such as "three finger swipe" = move, "two finger wipe down" = read whats on the screen.

Basically a VoiceOver user can get to hear what you see and they can interact with their apps 99%(*) as easily as sighted users but a bit slower.

(*) There is often a little thing like accessing some of the tiny screen objects that needs just the right knack to do it.

E.g. https://www.youtube.com/watch?v=bCHpdjvxBws