Apple plans on bringing its own San Francisco font seen on Apple Watch to iOS 9 and OS X 10.11, 9to5Mac reports. The font will replace Helvetica Neue, which debuted in iOS 7 in 2013. Though the San Francisco font was developed “specifically for legibility,” the idea to bring the font to iOS appears to have a mixed reaction within Apple — the report claims that higher-ups believe the font will help “iOS and OS X to avoid becoming stale,” but also notes that some Apple engineers don’t like the font, “which may look particularly rough on non-Retina screens.”