SF features wide, open apertures. Compare the lowercase ‘a’ or ‘e’ in San Francisco to Helvetica; SF’s are more rounded and open, reducing pixel bleed on a projector. This ensures that even an audience member sitting in the back row of a 5,000-seat auditorium can read a spec sheet instantly.
Apple licenses San Francisco specifically for developers to use in apps and mockups for Apple platforms. It is technically not licensed for general commercial use (like a logo for your own brand).
Introduced at WWDC 2015, San Francisco was the first new font designed at Apple in over 20 years. It was specifically engineered to solve the legibility issues of its predecessor, Helvetica Neue
The story of the current Apple Keynote font begins in 2014 with the birth of the Apple Watch [4]. Because the watch screen was so small, standard fonts became blurry or cramped. Apple’s design team, led by a passion for legibility, engineered a custom typeface called [3, 4]. The Evolution of the Keynote Look
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