Lecture went too fast? Catch up at home.

You receive — signup credits once, with no monthly regrant. Paid AI features spend credits; uploads and assignment parsing may charge before full-generation confirmation.

• Uploading a file: AI reads and summarises it.
• Assignment walkthroughs: the file is split into questions right after upload. You're asked to confirm only before the full walkthrough is generated.

Free: sync the last 14 days automatically every 6 hours; no manual sync. Paid: first sync covers the last 30 days and manual sync is available. Beta testers follow the paid rules. On every plan, after 7 days without opening the app, summaries, translation and search indexing pause while assignments, due dates and reminders keep running; they resume when you return.

Paid AI work stops when its credit balance is insufficient. Free deadline sync follows the sync rules above.

Settings → Usage shows your recent charges.

No other user can. Others only see what you share through a link you create yourself. Share a Knowledge Book with a classmate, for example, and they can read the key points but can't edit them or get your original files, and you can revoke the link at any time. Files you upload, questions you ask, and new assignments and posts from Canvas or Ed are sent to AI companies for processing, such as OpenAI, Google, Alibaba (Qwen), DeepSeek and Zhipu. We don't sell your data, and we don't use your study material to train those companies' models. The privacy policy explains how your data is kept and deleted.

Before it answers, it reads the slides and notes you've uploaded, and where they cover your question, it answers the way your course does. Where they don't, it still answers from what the AI knows or finds online, so double-check anything important. Knowledge Book points with a page number open straight to that page of your slides. Connect Canvas or Ed and your deadlines are here too, and problems you get wrong are saved for review.

Yes. Assignment walkthroughs, the Knowledge Book, asking about your own files and step-by-step problem solving all work without connecting a school system. Canvas and Ed Discussion are the two you can connect directly, and neither needs your uni password. For Canvas, enter your uni's Canvas address and paste an access token from Account → Settings (the button says New Access Token). For Ed, paste a token from Settings → API. For assignments posted anywhere else, paste a screenshot, a PDF or some text into the Quick Capture box on your home page after you sign in. It picks out the assignment and due date, and adds it to your tasks once you confirm.

The app is in English and Chinese, and explanations follow the language you choose. If you pick Chinese, English assignment questions are translated before they're explained. If you add worked examples and key terms to a Knowledge Book (an extra step that costs credits), its points show terms in both languages. You can also select any word in an assignment to translate it.

No. Your sign-up credits don't cover turning recordings into text. That needs a paid plan. Everything else on this page works on a free account, paid for with your sign-up credits.