Apple provides the official San Francisco font files for free, but they are hosted on their developer portal.
LegibilityThe high x-height (the height of lowercase letters) makes it incredibly easy to read at a glance, which is essential for mobile interfaces and notifications. fonte download san francisco
Download the .dmg file: Click the download link to get the installer package. Apple provides the official San Francisco font files
Optical SizingThe font automatically switches between "Text" and "Display" modes. At smaller sizes (under 20 points), the spacing is looser and the apertures are larger to prevent the letters from blurring together. At larger sizes, the spacing tightens for a cleaner look. Since San Francisco is restricted to Apple development,
Since San Francisco is restricted to Apple development, designers working on Windows or web-based projects often look for "look-alike" fonts that offer a similar vibe:
Visit the Apple Fonts page: Go to the official Apple Developer website under the "Fonts" section.
Before you click download, it is crucial to understand Apple’s License Agreement. Top 3 Free Alternatives for Windows and Web