Ask HN: What 'smartphone' should I get my mother?

Some background: My mom is 78, lives alone, and is very bad at technology. She has difficulty using a mouse, lost the password to her chromebook, and cannot remember where she puts the wi-fi password for the home, so currently is disconnected from the internet.

She says she wants a smartphone so that she can stay in touch with the world. I'd like to get her one so that she can keep up with news, write emails, but I want information egress to be as limited as possible (to prevent identity fraud or asset theft). Even if I tell her to never input her email address, I don't want her to click on a link that will download an app, for example.

Are there any non-obvious solutions to this? Otherwise, would IOS or Android be better? (I use Android, but consistency with me is a secondary factor)