Source-grounded flashcards
Turn your lectures and your own notes into flashcards that actually stick.
Every card links back to the exact slide it came from — upload your lecture and your own notes, and get source-linked flashcards and practice in one pass. Clean structured notes and a cheat sheet are one click away. Built for college & med students.
Sign in free (no card) — you get 3 free packs a month.
Have an invite code? Sign in to redeem it →
- Lecture + your own notes
- Source-linked cards
- Free — no card
See it, don't take our word for it
Flip through a real deck — live, right here
This is an actual hand-checked sample deck — flashcards, structured notes, and a cheat sheet — built to the quality bar your own decks aim for. It's the real interactive output, not a screenshot. Flip through it now — no signup to preview.
← → arrow keys to navigate cards
Hand-authored to the quality bar your decks aim for. Make one from your own lecture →
Upload to pack
How it works
Pick your field
Choose medicine, CS/math, science/engineering, law, humanities, or auto-detect. The field decides what gets surfaced: thresholds, notation, workflows, arguments, or cases.
Bring your lecture and your own notes
Upload the slides plus the notes you already wrote, paste text, or add board photos. CruxPack reads the structure, source-page figures, equations, tables, definitions, and slide flow so the cards reflect your material.
Get your pack
Atomic, source-linked flashcards and practice land in one pass — ready for active-recall study right on the site. Want clean structured notes and a cheat sheet too? One click.
Field-tuned & source-grounded
Cards that hold up at exam time
A med deck and an algorithms lecture should not become the same generic flashcards. Pick a field and the cards emphasize the patterns your exams punish, and every card traces back to the slide it came from — so drilling the deck is drilling the lecture.
Every card traces to a page
Cards and cheat-sheet boxes link to the slide they came from, so you can verify a claim against the source.
Tuned for your field
Med uses illness scripts; CS and math use worked traces; law uses IRAC. The structure matches how your subject is tested.
One upload, the whole pack
Atomic flashcards, optional structured notes, practice problems, and a printable cheat sheet — built in one pass.
Or jump straight to your subject
Not sure? Auto-detect reads the source and picks the best fit — and you can switch fields after generation.
Export anywhere
Study in the tools you already use
One upload, every format. Send the same source-grounded pack to your spaced-repetition deck, your documents, a printable PDF, LaTeX, or an AI notebook — no rebuilding it by hand.
- Anki (.apkg)
- Quizlet
- Word
- LaTeX
- NotebookLM
Good to know
Frequently asked questions
What can I upload?
Lecture PDFs and PowerPoint (PPTX) files, pasted text, and your own notes or images. CruxPack reads the structure, figures, equations, and tables before it writes anything.
Is it actually grounded in my source?
Yes. Packs are planned, written, then audited against the file for coverage and grounding. Notes carry source-page citations, and the figures and pages from your file sit right beside the explanations that cite them — so you can check any claim against the original in one tap.
Do I have to generate notes?
No — notes are optional and off by default. You can generate flashcards alone if you prefer. Writing your own notes is part of how you learn (the generation effect: producing the explanation yourself is what makes it stick), so we leave that choice to you rather than forcing AI notes on every upload.
What do I get in a pack?
Field-tuned, clean structured notes (with an optional Cornell view), atomic flashcards built for active recall, practice problems with worked answers, source figures, and a dense printable cheat sheet — all from one upload.
Can I use my own notes or photos too?
Yes. Add your own notes, screenshots, or photos of the board alongside the lecture, and they are folded into the same source-grounded pack.
Where can I take the pack to study?
Export to Anki, Quizlet, PDF, Word, LaTeX, or NotebookLM, so you can review in whatever tool you already use.
Is it free?
Yes — sign in free with no credit card and get 3 free packs a month on the free plan, plus 3 free regenerations to perfect them. (Creating a pack needs an account so we can save it to your library.) It is an early product built for students and med students memorizing dense material, so expect it to keep improving.
Simple pricing
Start free. Subscribe, or just buy a few packs.
Sign in free (no card) — you get 3 free packs a month. Go Pro for bigger notes, multi-file packs, and unlimited regenerations — or, if you’d rather not subscribe, buy a one-time pack reload and use them whenever.
Free
Everything you need to try it on a real lecture.
- Sign in free (no card) — 3 free packs a month
- One file per pack
- 3 free regenerations a month to perfect a pack
- Up to 10 tutor questions / 10 min
Pro
Subscribe for cramming weeks and whole-unit study packs.
- Combine up to 10 files into one whole-unit pack
- Unlimited regenerations — iterate as much as you need
- Up to 20 tutor questions / 10 min · priority generation
- Anki deck, LaTeX, and printable cheat-sheet PDF exports
Secure checkout via Stripe · cancel anytime
Pack Reloads
One-timePreview pricingNo subscription. Buy a few packs, use them whenever — they never expire.
2 packs· +1 regen
Try a couple packs
$55 packs· +3 regens
Most popular for one course
$1010 packs· +7 regens
Best value — a whole finals season
$15
One-time pack reloads unlock at launch.
Want the full comparison? See the pricing page →
Make your first pack
Upload one lecture plus your own notes and see the difference field-tuned, source-grounded flashcards make. Clean notes are one click away if you want them.
Make my flashcardsSign in free — no credit card. Built for college and med students memorizing dense material.