Real-time bilingual captions, powered by Gemini
Stop missing words
in English class.
CaptionTwin listens to your lecture, meeting, or podcast — and shows live English captions with Chinese translation underneath. After class, you get a complete study note in seconds.
Works in any browser · No download · Browser-based recording
The key idea behind supervised learning is that the model learns from labeled examples.
监督学习的核心思想,是模型从带标签的样本中学习。
Each training example consists of an input vector and a target output.
每个训练样本由一个输入向量和一个目标输出组成。
Let's regularize the loss to avoid overfitting.
我们对 loss 函数做正则化,避免过拟合。
Built for the moments English moves too fast
One product, four contexts. Same instant bilingual captions, same AI-generated review notes.
University lectures
CS229, ECON 101, organic chem — keep up when the professor accelerates and review the full notes after class.
Work meetings
Zoom, Google Meet, in-person standups. Catch every action item even when accents are heavy.
Podcasts & talks
Listen to Lex Fridman, a16z, or YC interviews — and walk away with bullet-point takeaways in Chinese.
Interviews & 1:1s
Coffee chats, OPT interviews, mentor calls. Replay the moment you froze and see exactly what was said.
Simple pricing. Cancel anytime.
Free for casual use. Pro for the busy semester. Unlimited if you live on calls.
Free
Try it before you commit.
- 5 hours of recording / month
- Bilingual subtitles
- Basic AI notes
Pro
For students who actually go to class.
- 20 hours of recording / month
- Detailed AI study notes
- Searchable session history
- Priority transcription queue
Unlimited
Heavy users, content creators, ESL pros.
- 60 hours of recording / month (fair-use)
- Everything in Pro
- Export transcripts (txt, srt)
- Early access to new features