Kumbh Sans by Saurabh Sharma
Kumbh Sans is a geometric sans-serif with slight contrast, designed as a workhorse typeface in modern web and mobile apps. It’s optimized for legibility at any point size, due to the cap-height vs x-height ratio is kept as 3:2.
Free for both personal and commercial use, under SIL OpenFont license.
SIL Open Font License → Licenses explained