Cereby
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Now on iPhone, Android and the web

The AI study companion that knows your classes.

Cereby knows your syllabus, your schedule, and what you keep getting wrong — then turns any topic into the video, podcast, quiz, or deck you'll actually study from.

Get started freeWatch the full tour
Download Cereby on the App StoreGet Cereby on Google Play

Available on the App Store and Google Play

Study notes in Cereby
Used by students at
Harvard University
Massachusetts Institute of Technology
Stanford University
Yale University
Princeton University
Columbia University
California Institute of Technology
Duke University
Northwestern University
University of Chicago
Vanderbilt University
University of California, Berkeley
University of California, Los Angeles
University of Michigan
University of Notre Dame
Harvard University
Massachusetts Institute of Technology
Stanford University
Yale University
Princeton University
Columbia University
California Institute of Technology
Duke University
Northwestern University
University of Chicago
Vanderbilt University
University of California, Berkeley
University of California, Los Angeles
University of Michigan
University of Notre Dame

One prompt. Every format.

Pick a chapter, pick how you want to learn it. Cereby builds it from your own materials.

Videos
Animated 5-minute lectures from any topic.
A frame from a Cereby lecture: How Photosynthesis Works
Podcasts
Two hosts explain it on your commute.
Now playing · Cell BiologyChapter 4 Recap
Quizzes & flashcards
Practice that focuses on what you got wrong.

Every miss sharpens the next quiz, and your flashcards show up right before you'd forget them.

See how practice works
A Cereby practice quiz on cellular respiration, on iPhone
Cereby flashcards for organic chemistry, on iPhone
See it end to end

Watch one chapter go all the way through.

Biology 101, start to finish: the notes, a recap without leaving the page, answers quoted from the source, a quiz, and the tutor that explains what you missed.

How it works

Three steps. Then it just knows.

  1. Add your classes

    Upload a syllabus, slides or notes, or connect Canvas. Each class gets its own folder.

    Cereby's materials library on iPhone: a folder each for Cell Biology, Organic Chemistry and Macroeconomics, above the class's notes, video and audio
  2. Ask for any format

    Ask a question or pick a format: a video, podcast, quiz, flashcards or a diagram.

    A Cereby chat on iPhone: asked to show the three stages of cellular respiration as a diagram, it answers with a flowchart
  3. Fix what you miss

    Every wrong answer shapes the next quiz, so review time goes where it counts.

    A Cereby practice quiz on cellular respiration, on iPhone
Everything else Cereby can do
Class Sync & Study PlansImport your syllabus. Get a study plan. Performance AnalysisSee where you're strong and where you're weak. Smart NotesAI-organized notes that grow with your class. Study GuidesExam-ready guides with practice problems. Images & DiagramsVisualize concepts with generated diagrams.
Your schedule

It knows when your next exam is.

Drop in your syllabus or connect Canvas. Every lecture, lab and due date lands on one calendar, with a study plan that works back from exam day.

How class sync works
Cereby's calendar: a week of lectures and labs by class, with the agenda beside it
Write

Write with AI. Don't sound like AI.

Two tools for the writing half of school: a detector that scores any draft for AI signal, and a humanizer that rewrites the flagged parts so they sound like you.

AI Detector
Score any draft for AI-generated patterns
In conclusion, the multifaceted nature of the issue underscores the importance of a comprehensive approach. Furthermore, it is imperative to delve deeper into the nuances that shape our understanding…
82/100
AI signal
Em-dash overuseLow sentence variety“Furthermore” loop
Try the detector
AI Humanizer
Rewrite flagged passages so they read like a person
In conclusion, the multifaceted nature of the issue underscores the importance of a comprehensive approach.
Bottom line: this isn't simple, and a one-angle fix won't cut it.
14/100
AI signal after rewrite
Cadence variedEm-dashes removedVoice kept
Try the humanizer

With you all semester.

Week 1
Drop in your syllabus.

Cereby finds every exam and deadline and builds the plan around them.

Midterms
Catch up on the chapter you skipped.

A video, a podcast and a quiz, all from the same pages.

Finals
Fix your weak points first.

Cereby ranks what to review by what you keep getting wrong.

FAQ

Questions students ask before signing up.

If your question isn't here, ask anything in the chat — a real person answers.

Once you import your syllabus (or connect Canvas / Google Classroom), Cereby tracks your class schedule, your assignments, when your next exam is, your performance on every quiz and flashcard, and the topics you keep getting wrong. Every video, podcast, quiz, and deck it generates is shaped by that — so studying always points at what's next and what's weakest.
Yes. Upload notes, a PDF, or paste a topic and Cereby produces a narrated, animated educational video — typically 3–7 minutes long.
It scores writing on patterns common in AI output: low sentence-length variance, vocabulary tells, em-dash overuse, and stylistic repetition. You get an overall AI signal score plus a breakdown by signal.
Yes. Drop in a syllabus PDF or connect Canvas / Google Classroom. Cereby parses out assignments, exam dates, and reading load, then plans your study time around them.
It rewrites AI-flagged paragraphs to sound natural — varying cadence, mixing sentence length, and removing the giveaways the detector flags. The goal is your voice, not generic 'human-like' prose.
Yes. Cereby tracks every miss and revisits weak areas more often. Flashcards use spaced repetition; quizzes re-weight question selection toward your trouble topics.
Yes — notes, basic quizzes, and flashcards stay free forever. Paid plans unlock unlimited AI generation (videos, podcasts, study guides) and the full performance analyzer.

Your next exam starts here.

Bring your syllabus. Cereby learns your schedule, tracks what's due and turns every topic into the video, podcast, quiz or deck you'll actually study from. Free to start, no card required.

Get started freeWatch the demo
Download Cereby on the App StoreGet Cereby on Google Play