yea i would skip all smartphones. i got them an ipad. my parents are i their 80. there was no way failing eyesight and hand coordination can handle a tiny smartphone screen. Also skip android. Android has truly shitty touch interface responsiveness compared to Apple devices. Apple has the world's best natural touch responsiveness. This is the main reason Apple is wooping Android ass. Dont waste money on smartphones for elderly. Only Ipads have a chance of working.
in fact for my mum, i was inclined to skip all touch devices. as a lady she has long fingernails. with arthritis making her fingers more crooked, there was no way for her to use a touchscreen. her fingernails would always tap the screen first. even if she trimmed her nails, her nails would touch first and the touch interface would fail. so i obtained a push button phone for her, old vintage desktop style.