Carol has a question about Apple’s iOS 9: “I was wondering if there is a way to change the font in iOS 9. I know how to change the size and boldness factors, but I would like to change the style.”
With iOS 9, Apple changed the default font from Helvetica to one called San Francisco. The San Francisco font is intended to increase readability. The San Francisco font was originally developed for the Apple Watch. Apple is so happy with it, they’ve made it the default font for iOS, OS X and watch OS.
You aren’t alone in wanting to change the font, but with iPads and iPhones, Apple’s goal is for a uniform user experience across all devices. That’s why iOS doesn’t really have many customization options.
I’m afraid, you’ll have to stick with the font Apple gives you for a system font until they make changes. However, some individual apps do give you the options to change the fonts within those apps.