I’m building an app to share notes, Constellational, and the font it uses is the Apple system font — which is San Francisco in iOS9. I want the website to reflect the experience of using the app as far as possible, so here’s how I used San Francisco on the web:
font-family: '-apple-system', 'Helvetica Neue', helvetica , sans!important;
That’s it! This is thanks to this StackOverflow answer and this blog post.
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