Features
Record in class, and walk out with notes, flashcards, practice tests and a plan — built by your own AI, with audio that never leaves your laptop. Free covers one class with every feature.
In class
One-button recording
No bots, no meeting links, works in any lecture hall.
Live notes while you listen
Grounded only in what was actually said, refreshed every few minutes, with a live transcript that keeps up with the room.
Highlight
One tap flags what the professor just said; it gets its own spot in your notes. Flag one from any app with ⌘⇧H (Ctrl+Shift+H on Windows).
Catch me up
Zoned out? Three bullets on the last five minutes, instantly.
Break button
Pause for the 10-minute break: the microphone turns fully off, and Resume continues the same lecture.
Crash-proof
Audio is saved in 10-second pieces; a dead battery costs you at most 10 seconds, and recovery rebuilds the notes.
Announcement radar
“Due Friday,” “exam covers…,” room changes — caught and quoted in your notes.
Menu-bar octopus
Record, stop and highlight without opening the window. Mic pre-check before class.
After class
Instant brief on Stop
Notes open before you’ve packed your bag. ✨ Day brief on multi-lecture days.
Flashcards from anything
Your notes, the textbook, the slides, any PDF; edit any card, skip any card.
Spaced review
Cards come back right before you’d forget (1 → 3 → 7 → 14 → 30 days).
Exam mode
Review only what your professor actually tests.
Practice tests in your professor’s style
Built from their real problem sets and past exams; anything you miss becomes a flashcard automatically.
Concept map
A visual map of the course: foundations on top, arrows to what builds on them, colored by how strong you are on each. Hover to trace any concept’s chain.
Exam scope
Pick your next exam and the map lights up the concepts it needs, then teaches you the next one you’re not strong on yet.
Analyze a class
Point it at the syllabus, slides and past tests: topics ranked by weight, how your professor asks questions, and what’s most likely to be tested. Then build practice from it, if you ask.
Teach me from the ground up
Click any concept and get a lesson that starts at its prerequisites.
Weekly coach
A this-week plan built from the syllabus, your real deadlines, and your weak cards.
Ask your lectures anything
“When does SN1 beat SN2?”, “list every formula from Calc II this week”, “what’s likely on the exam.” Select any text → 💬 Ask / 📖 Explain / 🃏 Card it. Answers stream in as they’re written.
Show me
AI-drawn visuals on tests, lessons and answers.
Tidy notes
Cleans up any lecture’s notes; the original is always kept.
Import recordings (Mac)
Professor posted the lecture recording? Drop it in, get full notes.
Your AI, your choice
Bring your own AI
One-click OpenRouter, or an API key from Anthropic, OpenAI or Google. Balanced is quick and inexpensive; Best uses a stronger model for lessons, drawings, Analyze and practice tests.
Ask in Claude, ChatGPT or Gemini
No key? Tentaku shows exactly what it will copy, lets you edit it, puts it on the clipboard and opens the AI app you already use. You paste and press send yourself.
Useful with no AI at all
Recording, on-device transcripts, search, highlights, your own flashcards (+ New card) and every export work without connecting anything. AI buttons just say “Connect an AI to use this”.
Organized for you
A hub per class
Lectures, documents, search, all in one page.
Drop anything, it sorts itself
Tentaku reads the file and files it: Homework, Syllabus, Tests, Slides, Readings (and you can always move it).
Built-in textbook viewer
Jump to any page or chapter; ask it “summarize pages 120–130” or “help me with problem 3”.
Downloads auto-filing (opt-in)
Off until you say yes. When on, course documents you download are filed into the right class by name, with an ↩ undo. Nothing leaves your computer.
Search every lecture
One box searches all transcripts and notes in a class.
Class packs (Mac)
Share a class — notes, transcripts, documents, cards, map, plan, tests — with a classmate as one file; your audio never travels.
Back up everything (Mac)
One click zips your whole Documents/Tentaku folder.
Connected to your school
Any school calendar
Canvas, Blackboard, Moodle and Brightspace deadlines through the read-only calendar-feed link. No login, no password.
Professor’s course sites
Tentaku checks it for new PDFs and lists them on the class page with a ⤓ Get button.
Deadline check-off
Done is done; checked items leave your plan.
Phone calendar export
Your deadlines as a file Google or Apple Calendar imports. Flashcards export to Anki.
Use Tentaku inside your AI apps
Add Tentaku’s connector to the Claude desktop app, Gemini CLI, Cursor, VS Code or LM Studio and ask about your lectures there. Tentaku’s connector reads your notes, can add cards and notes, and never edits or deletes.
Badges and a mascot
10 achievement badges, and a Buddy or Scholar octopus to match your mood.
Private by architecture
- Audio never leaves your laptop. Recording and transcription happen on your machine, offline.
- Bring your own AI. One-click OpenRouter sign-in, or an API key from Anthropic, OpenAI or Google (pay-as-you-go, usually cents per lecture, separate from any ChatGPT Plus / Claude Pro subscription). Tentaku never meters, marks up, or resells AI.
- Keys are encrypted on your computer. Tentaku stores them scrambled with a key your operating system’s keychain protects, inside Documents/Tentaku.
- Your data is yours. Plain files in Documents/Tentaku; export, back up, or walk away anytime. No lock-in, ever.
- Never records on its own. You press the button, every time.