iOS actually offers quite a few customization options hidden in the accessibility settings (I say hidden because most people won't think to look there, or at least not first). It's worth exploring, even as an able-bodied person (other than terrible, but correctable, eyesight) there are a number of useful settings I've found. Plus it helps when I am working with family members who do need those options since I've seen and played with them myself so can help them more.