Typography That Converts

Type is the most underestimated design variable in product interfaces. Most teams spend weeks debating button colours and minutes choosing a typeface. The research suggests they have those priorities backwards.

Legibility is how easily individual characters are distinguished. Readability is how easily continuous text can be read. They're related but not the same - a highly legible typeface can still be unreadable at small sizes or long line lengths.

System fonts load instantly and look native on each platform. Custom fonts add personality and brand distinctiveness but cost performance. The right answer depends on how differentiated your brand needs to feel vs how fast your pages need to load.