SF has the codename SFNS in macOS and SFUI in iOS, regardless of the official name. Stylistic fonts exist, which are mainly present in the iOS 16 Lock Screen, Apple Cash, watchOS Watch Faces, and several promotional materials. These include chiseled, dotted, prisma, railed, slab-serif, and stenciled versions. Semi-rounded versions of the regular, railed, slab-serif, and stenciled versions also exist. Beyond this, other typefaces are used, such as a rounded geometric typeface used in watch faces, such as Numerals Duo, and a cursive typeface used for promotional materials and the setup screen since iOS 15. Some variants have two
optical sizes: "display" for large and "text" for small text. The letters in the "text" size have larger
apertures and more generous
letter-spacing than in the "display" size. The operating system automatically chooses the "display" size for sizes of at least 20
points and the "text" size for smaller size. Variable grades were eventually added in newer versions. A separate variable numeral font is used for the Lock Screen timer from iOS 26, where the numerals are boxier in regular widths, similar to SF Compact.
SF Pro/SF UI UI font for
macOS,
iOS,
iPadOS, and
tvOS. In 2017, a revised version,
SF Pro was introduced, supporting an expanded list of weights, optical sizes, glyphs and languages.
SF Pro Text and
SF Pro Display come in nine weights (the Text version had only six weights when introduced) plus corresponding italics.
SF Pro Rounded (codename SFUIRounded), which comes in the same nine weights and has the same figure as the "Display" version but with rounded corners, was introduced in 2018. These fonts, for use in different languages, can be found on the Apple website in their corresponding regions of use as variations of SF Pro: •
SF Pro AR, and
SF Pro TH are fonts for
Arabic, and
Thai scripts respectively. •
SF Pro SC,
SF Pro TC and
SF Pro HK are Chinese fonts; they are labeled as the PingFang family. •
SF Pro JP is Japanese font; it is labeled as the AXIS Std family. •
SF Pro KR is Korean font; it is labeled as the Sandoll GothicNeo1 family. SF Pro is a variable font that also has variable widths in conjunction with weights, optical sizes, and grades. One of them is a print-optimized variant,
SF Hello, which is restricted to Apple employees and permitted contractors and vendors, and is therefore unavailable for public use. Additionally, since iOS 16, the variable typeface is used for the lock screen clock, alongside the Metropolitan typeface introduced in watchOS 9. This allows for additional fonts derived from SF Pro as shown below.
SF Condensed A condensed variant of SF Pro.
SF Condensed Text has six weights, while
SF Condensed Display has nine. Variants are internally named
SF Cash,
SF Shields, and
SF Condensed Photos.
SF Compressed A compressed variant of SF Pro. Vertical edges are fully straight and kerning is much closer, unlike in SF Condensed.
SF Expanded Internally called SF Wide, it is an extended/widened variant of SF Pro.
SF Compact The initial version introduced with the
Apple Watch and
watchOS, later rebranded as SF Compact with the introduction of SF UI at WWDC 2015. Its characters' round curves are flatter than those of SF Pro, allowing the letters to be laid out with more space between them, thereby making the text more legible at small sizes, which the Apple Watch's small screen demands. It was introduced at WWDC 2016. It was officially released under the name
New York on the Apple Developer site on June 3, 2019. The typeface comes in
Small,
Medium,
Large and
Extra Large sizes, each in six weights and corresponding italics. It also includes
OpenType features for lining and old-style figures in both proportional and tabular widths. This typeface differs from, and is not related to, Apple's older
font with the same name with the
bitmap format for the original Macintosh (and later converted to
TrueType format). ==Variable fonts==