Duolingo boss plans to take on TikTok with maths

Duolingo founder and chief executive Luis von Ahn is aiming to lure children away from TikTok and Instagram with the popular language-learning app's new mathematics version. The app, focused on primary-school-level mathematics, is due to launch next year. And the company increasingly sees its rivals as other popular free apps such as TikTok and Instagram, rather than education platforms, since all are vying for screen-time attention.