AI transcribes every word—
then reads it in your language.
From lectures and meetings to talks, LecSync transcribes and translates everything you hear, and can read the translation into your earphones in a natural voice. Afterward, get bilingual outputs and notes automatically.
01 · AI Live Transcription
Understand it live. Turn every word into something useful.
Transcribe and translate lectures, meetings, and interviews in real time, then turn them into notes, highlights, and answers you can keep exploring.
Explore Live Transcription02 · Simultaneous Interpretation
Eyes on the speaker. Your language in your ears.
In foreign-language lectures and meetings, LecSync translates in real time and reads the translation to you in a natural voice. No more staring at captions: look up and keep up with the speaker and the slides.
Explore Simultaneous Interpretation01 · AI Live Transcription
Understand it live. Turn every word into something useful.
Transcribe and translate lectures, meetings, and interviews in real time, then turn them into notes, highlights, and answers you can keep exploring.
Explore Live Transcription
Bidirectional Translation
Real-time translation across 60+ languages. Choose on-device AI for privacy or cloud translation for maximum accuracy and language coverage.
Learn moreAuto Meeting Notes
Every session automatically generates structured meeting notes with key points and highlights. Summaries delivered to your inbox — zero manual note-taking required.
Learn moreInstant AI Chat
Ask questions about your transcript the moment recording ends. "What was said about the quarterly targets?" Get instant, context-aware answers from your AI assistant.
Learn moreHands-off after class
Stop recording. LecSync does the sorting.
No more dragging recordings into folders. LecSync can tell which lecturer is speaking, files each recording under the right course, and turns it into bilingual study material.
Learn moreFiled under the right course
Voice recognition tells which lecturer is speaking and moves the recording into that course’s folder. For a new course, it creates the folder and names it from the content. You’re told every time, and one tap undoes it.
Bilingual study notes, ready to review
Every lecture becomes exam-focused notes with the original language side by side with yours. Tap any point to jump to the exact sentence and hear it again. Before exams, merge several lectures into one review pack.
Upload the slides, get the jargon right
Drop PPT or PDF files into a course folder. LecSync pulls out the key terms and uses them to recognize every future recording of that course.
Voice recognition is only used to organize your own recordings, is never shared, and can be turned off in Settings anytime.
Fast and accurate
Fast enough to follow live. Accurate enough to use.
Low latency keeps the words in step with the speaker, while industry-leading accuracy means less cleanup and more attention on what is happening now.
<200ms
Live transcription latency
1.25% WER
Industry-leading word error rate
02 · Simultaneous Interpretation
Eyes on the speaker. Your language in your ears.
In foreign-language lectures and meetings, LecSync translates in real time and reads the translation to you in a natural voice. No more staring at captions: look up and keep up with the speaker and the slides.
Explore Simultaneous InterpretationLa mitochondrie est l’endroit où la cellule produit l’essentiel de son énergie.
The mitochondria is where the cell produces most of its energy.
Donc, quand l’oxygène manque, ce processus ralentit fortement.
So when oxygen runs low, this process slows down dramatically.
Each sentence is read aloud right after the speaker finishes it; long sentences are split at commas
Keeps up with fast talkers: speeds up automatically when it falls behind, without changing pitch
Male or female voice, 0.8–1.5× speed; transcript, translation, and audio are saved as usual
From our users
In their own words
We asked users what they like most about LecSync. 76 people answered — here are a few of their replies.
Finals
I used to half-guess my way through lectures, and finals week was painful — begging classmates for notes that were never complete. Now I read the translation while taking notes, and anything I miss is in the summary.
之前上课真的半猜半蒙，一到期末周特别痛苦，问同学各种要笔记，还不一定是全的。现在可以一边看翻译一边记笔记，实在记不住还有纪要帮我。
International student in France
French → Chinese · 51 recordings
Accents
My professors all have accents. Other translation apps couldn’t handle it, and neither could the pricey translation earbuds I bought. Since finding LecSync, translation feels effortless.
教授们都有口音，用其他翻译 App 也不行，花 1500 买的翻译耳机也翻译不了。发现这个软件以后，感觉翻译得非常轻松。
International student in Malaysia
English → Chinese · 26 recordings
Keeps up
I tried three or four translation apps — either inaccurate or so slow the professor had moved on by the time captions appeared. LecSync is practically real time, and the accuracy is solid.
之前试了三四个翻译软件，要么不够准，要么太慢，等字幕出来老师早就讲过去了。LecSync 几乎就是实时同步的，准确度也非常在线。
Student in the UK
English · 10 recordings
Casual speech
I’m on exchange in a Spanish-speaking country. Locals speak casually and sometimes flip the word order, yet LecSync still gets the order right — it’s not just literal machine translation.
我在西班牙语国家交换。面对当地人比较口语的表达，有时前后语序颠倒，LecSync 的翻译仍然能调整好语序，并非简单的机器翻译。
Exchange student in Colombia
Spanish → Chinese · 5 recordings
Jargon
Even the tongue-twisting terms in my water supply and drainage courses are mostly recognized correctly. The AI also remembers terms I’ve corrected, so it fits my field better over time.
给排水专业课里那些拗口的专业词汇，也大多能准确识别，不会乱翻。AI 还能记住我之前修正过的术语，越用越贴合我的专业。
International student in St. Petersburg
Russian → Chinese · 3 recordings
Review
Reading an hour-long recording line by line would take forever. The summary outlines each part, so I know roughly where to find what I’m looking for.
一个多小时的录音，一句句看不知道要看到什么时候。纪要把每段话的大概内容整理出来，我能知道想找的东西大概在哪里。
International student in the UK
English → Chinese · 21 recordings
Zoned out
Once, when I was completely lost in class, the AI laid out what I was supposed to be doing right then — so I didn’t miss a deadline.
有一次上课上得云里雾里，AI 帮我整理出了我现在要干什么，避免错过 ddl。
International student in Singapore
English → Chinese · 29 recordings
Class discussion
Lots of translators couldn’t get it right; this one can. What I love most is that discussion questions pop up automatically during class, with answers drawn from the lecture.
用了很多翻译器都不能精准翻译，这个可以。最让我欣慰的是上课时会自动弹出将要讨论的问题，再结合课上的知识给出回答。
International student in Korea
Korean → Chinese · 40 recordings
Meetings
Meeting Russian clients with other apps meant: you speak, wait for the translation, they speak, wait again — a huge waste of time. LecSync translates in real time and saves us a lot of time.
和俄罗斯客户开会，用其他软件，你说一句等翻译，他说一句等翻译，非常浪费时间。LecSync 直接实时翻译，省了很多时间。
Works with Russian clients
Russian → Chinese · 7 recordings
Excerpted from an October 2026 user poll and translated from Chinese, with the original under each quote. Some participants received a free month of Pro. Shown anonymously.
Got questions?
Frequently Asked Questions
1Is LecSync really free to start?
2How accurate is the real-time transcription?
3What languages does LecSync support?
4What is the difference between live translation and simultaneous interpretation?
5Can I use LecSync for my team?
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