I tried to keep both my website and mobile companion app as consistent as possible to keep the user accessibility needs the same. I made the text stand out and made it as large as I could while still fitting all the info I needed on each page, ensuring that the text would fit on both website and app without changing. I also used the same button as to not cause any confusion the to the user/people with accessibility needs. I also made it stand out so it would be easy to see.
I decided to only have one button to navigate through the pages to make it easier for the users with accessibility needs. It also made both my website and mobile companion app easy to navigate.