Youdao Launches Euler Tutor, an AI Agent That Walks Students Through the Maths
NetEase Youdao has launched Euler Tutor (欧拉讲题), an interactive maths agent that the company describes as its first product built around explaining problems rather than solving them. The app is available now on Chinese app stores, in a test version that is free to use for a limited period.
The pitch rests on a familiar frustration. A student reads the answer to a geometry problem and still cannot see why the auxiliary line goes where it goes; a function question is re-read several times, and a small change in the conditions is enough to undo the understanding. Youdao argues that the bottleneck is not access to answers but the absence of an explanation that responds to where a particular student is stuck.
Euler Tutor approaches a single problem in three passes. It first signals the direction of attack before unfolding the working, showing the key derivations and calculations; once the walkthrough ends, the model classifies the method used and names what the question was actually testing. Students can then interrupt at any step with their own question, so the explanation is not locked to a fixed script. The third layer is visual: a dynamic whiteboard, diagrams and formula derivations, aimed at geometry, functions and multi-step proofs where text alone rarely carries the idea. Company materials also list whole-paper homework marking as a fourth function, positioning the product as a study loop rather than a search box.
The product draws on nearly two decades of consumer learning hardware. Youdao, founded in 2006 and listed in New York, sold out its first-generation AI answering pen in February 2025; secondary-school science and maths questions accounted for 60 percent of the queries it received. Later versions added whiteboard-style video answers, then natural-language interaction with multi-turn dialogue and context memory.
The underlying models follow a similar arc. Youdao released its Ziyue (子曰) education model in 2023, among the first batch to clear China's model filing process, open-sourced the Ziyue-o1 reasoning model in 2025, and upgraded to the multimodal Ziyue 4 this year, which the company says improved handling of complex visual maths. Earlier applications built on the same stack include the Hi Echo speaking coach and the Xiao P AI home tutor.
Maths has become the most contested subject in Chinese AI education, and the competitive question is shifting from whether a model can get the answer right to whether it can teach a student to get there. Step-by-step reasoning, interactive questioning and visual working are becoming the baseline for a new generation of subject agents — a direction global edtech developers are moving in as well, away from answer engines and towards tutors that hold a conversation.
The pitch rests on a familiar frustration. A student reads the answer to a geometry problem and still cannot see why the auxiliary line goes where it goes; a function question is re-read several times, and a small change in the conditions is enough to undo the understanding. Youdao argues that the bottleneck is not access to answers but the absence of an explanation that responds to where a particular student is stuck.
Euler Tutor approaches a single problem in three passes. It first signals the direction of attack before unfolding the working, showing the key derivations and calculations; once the walkthrough ends, the model classifies the method used and names what the question was actually testing. Students can then interrupt at any step with their own question, so the explanation is not locked to a fixed script. The third layer is visual: a dynamic whiteboard, diagrams and formula derivations, aimed at geometry, functions and multi-step proofs where text alone rarely carries the idea. Company materials also list whole-paper homework marking as a fourth function, positioning the product as a study loop rather than a search box.
The product draws on nearly two decades of consumer learning hardware. Youdao, founded in 2006 and listed in New York, sold out its first-generation AI answering pen in February 2025; secondary-school science and maths questions accounted for 60 percent of the queries it received. Later versions added whiteboard-style video answers, then natural-language interaction with multi-turn dialogue and context memory.
The underlying models follow a similar arc. Youdao released its Ziyue (子曰) education model in 2023, among the first batch to clear China's model filing process, open-sourced the Ziyue-o1 reasoning model in 2025, and upgraded to the multimodal Ziyue 4 this year, which the company says improved handling of complex visual maths. Earlier applications built on the same stack include the Hi Echo speaking coach and the Xiao P AI home tutor.
Maths has become the most contested subject in Chinese AI education, and the competitive question is shifting from whether a model can get the answer right to whether it can teach a student to get there. Step-by-step reasoning, interactive questioning and visual working are becoming the baseline for a new generation of subject agents — a direction global edtech developers are moving in as well, away from answer engines and towards tutors that hold a conversation.
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