01
Drop in your material
Slides, scripts, past exams. 67 reads only what you give it — nothing else.
SECHSSIEBEN · AI study tool
Turn your lecture PDFs
Turn your lecture PDFs
into mastery.
67 reads your course materials, writes the flashcards and questions, grades your answers, and schedules every review. You just show up and recall.
Grounded only in the materials you upload. No syllabus invented.
Frage
What is the worst-case running time of binary search on a sorted array of n elements?
Antwort
Θ(log n) — every comparison halves the remaining search interval.
How it works
From PDF to recall, in one loop
Four steps, no setup theatre. The same pipeline whether you're cramming one chapter or a whole semester.
02
Generate cards & Q&A
Pick a topic. A free LLM writes flashcards and questions, grounded in your pages.
03
Keep the good ones
Save cards and answers as plain JSON you own — portable, inspectable, yours.
04
Practise & self-grade
Review on a spaced schedule, rate your answers, and let the loop close itself.
Why students stick with it
Honest study tools, not a chatbot guessing
Every answer traces back to a page you uploaded. No lock-in, no surprise bills, no fabricated facts.
Grounded by design
67 won't invent a syllabus. Each card and question is sourced strictly from your own materials, so what you revise is what you'll be examined on.
No vendor lock-in BYO key
Bring a free Mistral, Gemini or OpenRouter key — whichever you like. Switch providers any time; your cards don't care who wrote them.
Spaced repetition
Cards resurface right as you're about to forget them — the memory curve, automated.
Graded answers
Rate correctness and completeness on open questions — not just "did I flip the card."
Token-smart
Hits free-tier limits gracefully with retrieval and summarisation — no paywall ambush.
Depth, measured
Past memorising, toward understanding
Lazy prompts give you flat recall. 67 uses structured prompts — role, target level, worked example — so your questions climb Bloom's taxonomy into analyse and evaluate, where real exams live.
Pricing
Free to adopt, priced to scale
Start with your own API key and pay nothing. Upgrade when a managed, synced semester is worth a coffee a month.
Free
For the self-directed student.
€0
forever, on your own key
- Unlimited card generation
- Local JSON storage you own
- Spaced repetition & grading
- One active course
Pro
For a serious semester.
€5 / mo
billed monthly · cancel anytime
- Managed inference — no key needed
- Sync across all your devices
- Unlimited courses & smart retrieval
- Progress analytics
Campus
For Fachschaften & faculties.
Let's talk
per-seat institutional licence
- SSO & university login
- Shared course libraries
- Cohort dashboards
- Priority support
Built for the AuP lecture.
Designed for every campus.
Stop re-reading PDFs and hoping it sticks. Start recalling.