SF Pro is Apple’s proprietary sans-serif typeface, introduced in 2015 with iOS 9. It replaced Helvetica Neue as the system font across Apple platforms.
| Feature | Description |
|---------|-------------|
| Classification | Neo-grotesque sans-serif |
| Influences | Helvetica, DIN, Univers, FF Meta |
| Optical size variants | SF Pro Text (smaller sizes, wider apertures, looser spacing)
SF Pro Display (larger sizes, tighter spacing, refined details) |
| X-height | Large, improving legibility on low‑resolution screens |
| Apertures | Open (e.g., ‘c’, ‘e’, ‘s’), avoiding the “closed” look of Helvetica |
| Terminals | Slightly angled, not fully horizontal |
| Stroke contrast | Low, nearly monoline – but with subtle optical adjustments |
| Letterforms | ‘a’ – double‑storey; ‘g’ – double‑storey with open loop; ‘t’ – angled cut at bottom; ‘Q’ – tail extends from center; ‘R’ – curved leg | sf pro-regular font
Look at the period (.) and the tittle above the "i" and "j". In SF Pro-Regular, these are not circular; they are slightly squared off (rounded squares). This subtle geometric consistency creates a mechanical, precise aesthetic that mirrors Apple’s hardware design language. Detailed Analysis: SF Pro-Regular SF Pro is Apple’s
| Feature tag | Effect |
|-------------|--------|
| ss01 | Alternate ‘g’ (single‑storey) |
| ss02 | Alternate ‘a’ (single‑storey) |
| ss03 | Straight double‑quote marks |
| ss04 | Uppercase ‘i’ with crossbars (Turkish/Indonesian) |
| ss05 | Lowercase ‘l’ with tail |
| ss06 | Lowercase ‘u’ without terminal serif |
| ss07 | Lowercase ‘y’ with straight descender |
| ss08 | Lowercase ‘e’ with flat terminal |
| zero | Slashed zero |
| frac | Diagonal fractions |
| ordn | Ordinals (1st, 2nd, etc.) |
| tnum | Tabular numbers |
| pnum | Proportional numbers |
| liga | Standard ligatures (fi, fl) | Developing applications for Apple platforms (iOS
-apple-system or BlinkMacSystemFont in CSS (system font fallback).Do not use Photoshop’s "Fake Bold" or "Fake Italic" on SF Pro-Regular. Always use the correct weight: SF Pro-Bold, SF Pro-Semibold, or SF Pro-Italic. Faux variants distort the careful optical spacing.