By Akash Sriram

(Reuters) -Duolingo forecast fourth-quarter bookings below Wall Street estimates on Wednesday as the company prioritizes user growth and teaching ​quality on its app, sending its shares tumbling 20% in trading after ‌the bell.

The company forecast bookings to be between $329.5 million and $335.5 million for the quarter, ‌below estimates of $343.6 million, according to analysts polled by Visible Alpha.

“We will focus on monetization, but the balance is shifting a little bit. On a relative basis, we’re going to work more on teaching quality than we have in the recent ⁠past,” CEO Luis von ‌Ahn told Reuters.

The downbeat bookings projections overshadowed an annual revenue forecast raise following a third-quarter beat.

The company operates on a “freemium” model ‍and has sought to convert free users to paid subscriptions, such as “Super Duolingo” for an ad-free experience, and “Duolingo Max,” which incorporates generative AI features.

“​We are one of the few companies that has found a way to make profit ‌off of AI. This is actually profitable for us,” von Ahn said.

While the AI additions resulted in a lower profit margin in the third quarter of 72.5%, it was still higher than estimates of 71.4%, according to data compiled by LSEG.

A growing user base continued to drive conversions from free users to paid ⁠subscribers. Paid users jumped 34% to 11.​5 million in the third quarter.

Growth was bolstered by ​outsized performance in China. A partnership with Luckin Coffee in July helped boost visibility in the region.

In the third quarter, revenue of $271.7 ‍million beat estimates of ⁠$260.3 million. Duolingo has topped revenue estimates every quarter since the company went public in 2021.

The company raised its annual revenue forecast to between $1.028 billion ⁠and $1.032 billion, from $1.01 billion to $1.02 billion. Analysts on average were ‌expecting $1.02 billion, according to LSEG data.

(Reporting by Akash ‌Sriram in Bengaluru; Editing by Sriraj Kalluvila)