San Francisco (sans-serif typeface) and iOS 10 is a new variant named "SF Compact Rounded". It is used in the new contact placeholder icons introduced in the OSes. The "SF Serif" variant was showcased during the keynote at WWDC 2018 on June 4, 2018 when the all-new Apple Books app was introduced. This variant is exclusive to Apple Books in iOS 12 and macOS Mojave, is not mentioned in Apple's Typography design guidelines, and is not publicly downloadable like other variants of the San Francisco typeface. Since its introduction, San Francisco has gradually replaced most of Apple's other typefaces on their software and hardware
Helvetica Helvetica Greek had designed a modernised version of Akzidenz-Grotesk for signage at Heathrow in 1961, and commented later "if we'd known about [Helvetica] I'm sure we would have used it, since it's a much better typeface than the one I drew. But the typesetting trade was very conservative then, and new type designs traveled slowly." The family consists of Helvetica Compressed, Helvetica Extra Compressed and Helvetica Ultra Compressed fonts. It has been digitised, for instance in the Adobe Helvetica release. Helvetica Rounded is a version containing rounded stroke terminators, released for bold weights. Linotype's release notes date it to 1978.