Learning something true, every day, should take five minutes.

Sophia is a general-knowledge app. Every course answers one real question in five short parts, ends with an open-book quiz, explains its difficult words and cites its sources. The courses are written by professors and researchers, reviewed before publication, and translated into 30 languages so that a reader in Tokyo and a reader in Lyon learn the same thing.

500,000 people have read courses on Sophia. The introduction of every course is free to read; Premium, in the app, unlocks the full catalogue.