Nunito Sans
Google Fonts · Vernon Adams · 2016

A versatile rounded grotesque that balances friendliness with the neutrality needed for serious interface work.
About
Nunito Sans trades some of its sibling's overt warmth for a more structured, utilitarian character, making it better suited to corporate interfaces, editorial body text, and data-heavy screens. Its wide weight range and Cyrillic support make it a capable workhorse for multilingual digital products. It sits comfortably between expressive and functional, fitting a broad range of design briefs.
Classification
Nunito Sans is a companion to Nunito that retains rounded terminals but adopts squarer, more neutral proportions, bringing it closer to a conventional grotesque in feel. It similarly spans a broad weight range.