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 fonts, Helvetica Bold among them. Sans forgetica is an unofficial version of Helvetica sans-serif intended as a learning aid . In 2011, one of Google's April Fools' Day jokes centered on the use of Helvetica. If a user attempted to search for the term "Helvetica" using the search engine, the results would be displayed in the font Comic Sans. Helvetica Helvetica or Neue Haas Grotesk is a widely used sans-serif typeface developed in 1957 by Swiss typeface designer Max Miedinger with input from Eduard Hoffmann. Helvetica is a neo-grotesque or realist design, one influenced by the famous 19th century typeface