How to completely replace Helvetica with San Francisco in iOS 9, the system font had changed from Helvetica to San Francisco. I love the change! However, it doesn't change it in pages in Safari. Is there a way to change it to San Francisco? Thanks!
You can't change fonts without jailbreaking. If your device is jailbroken, you can copy your preferred SFUI font family from /System/Library/Fonts/CoreUI/ over the top of each Helvetica font in /System/Library/Fonts/Core/.