There is no perfect typeface that works for all sizes, all devices, all apps, all styles, and all moods. But as the default choice for Android, with over 2.5 billion active users in over 190 countries, and as the most popular download from Google Fonts, Roboto should be as flexible as possible. The Roboto superfamily has grown over time, updated over the years to improve its language support and aesthetic qualities. Initially launched in 2011 as sans and condensed with slab and mono companions, and expanded with Roboto Serif, Roboto Flex is the latest step forward for this powerful type system. Roboto Flex is Google Fonts' largest project to date. With a wide range of weights and widths in a full set of optical sizes, plus additional fine-tuning capabilities, Font Bureau designed Roboto Flex to be super scalable, adaptable, customizable and optimizable.