Roboto
Open Foundry · Christian Robertson

Google's signature sans-serif, designed by Christian Robertson as the default typeface for Android and Chrome OS across eighteen styles.
About
Designed by Christian Robertson for Google, Roboto serves as the default typeface on Android and Chrome OS and the recommended font for the Material Design visual language. The family spans nine weights from Thin to Black, each with a matching italic, covering Latin, Cyrillic and Greek characters in Unicode 7.0 alongside the Georgian lari currency symbol. Its mix of geometric structure and open, humanist letterforms makes it a reliable workhorse for on-screen text at most sizes.
Classification
Roboto is classified as a sans-serif with humanist qualities, blending geometric structure with open letterforms and natural rhythm suited to screen environments.