How to design UX for elderly?
Use big, legible fonts and semi-modular icons so they can be accessible to people with impaired vision. Best of all, allow people to change their font size within an app. Customizable font sizes make it easier for seniors to adjust the size of the text.
How to design for elderly people?
When designing for older adults, particularly those over the age of 70, keep gestures simple to perform. Forget complex gestures that require more than two fingers (those can be a pain to master regardless of age). Simple horizontal, vertical, or diagonal movement is fine, as these are all natural motions.