Duolingo Inc (NASDAQ:DUOL) reported Q4 earnings with revenue and EPS beating estimates, significant growth in engagement, and strong guidance for future revenue. Q4 revenue was $150.99 million, surpassing the $148.09 million estimate, and EPS was 26 cents, beating the 15 cents estimate. The company saw a 51% year-over-year increase in total bookings to $191 million, a 57% increase in paid subscribers to 6.6 million, and record user engagement with 26.9 million daily and 88.4 million monthly active users. Duolingo's outlook for Q1 revenue is between $164 million and $167 million, above the $159.238 million estimate, with full-year revenue expected to be between $717.5 million and $729.5 million, surpassing the $699.096 million estimate. Shares were up 21.2% after hours at $237.