big buttons (but as few as possible),
contact list (easy to navigate),
read texts (She does not text but sometimes receives them for administrative info),
speaker phone with ok performance.
as few bells and whistles as possible.
Commercial solutions do not really meet these needs (AFAIK, I am open to other suggestions). Thank you for any help you might be able to provide. Please ask for any clarification that might help answer the question. I think this could be a useful thing to exist in the world.
https://support.apple.com/en-in/guide/assistive-access-iphon...
My father was reluctant to switch from his beloved Blackberry to an iPhone.
Once he made the change, he found it so easy to use that he became much more engaged with technology and using his phone. The transition was so smooth that he developed retrograde amnesia in relation to his previous (or was that my trouble (emoji: thinking) in navigating a handy. While I'm not an Apple fanatic, this was a very positive experience with the switch to iPhone. Ease of use.
I posted an explanation then as to why proposing iPads and iPhones is missing the point. I think the same sentiment applies.
https://news.ycombinator.com/item?id=23598685
OP: I have no answers for existing solutions but I have no doubt there are customers out there for such a product. Funnily enough the target market isn't so much the end user but rather their adult children that want to be able to provide them with a solution that won't cause UX problems every 6 months because some patch changed the UI for no good reason :)