The findings
Re-reading, highlighting, copying out: it feels good, but it doesn't work.
Ebbinghaus measured it back in 1885: without active recall, your brain sorts as it goes and memory drops off exponentially. The good news: every spaced recall pushes forgetting a little further out. All that was missing was a tool to do it for you.
Active recall
×2
Testing yourself means remembering twice as well
The testing effect is one of the most robust findings in cognitive science: we remember what we make an effort to recall.
Spaced repetition
−20 to 30%
fewer reviews with FSRS
Memojin uses FSRS, the most refined spaced repetition algorithm there is — a published algorithm, not a black box. For the same retention, 20 to 30% fewer reviews than a conventional schedule — a measured property of the algorithm, until our own data says otherwise.
Immediate feedback
15 min
a day is enough
Quizzes marked with explanations: not just “wrong”, but why, and what to go over. Short, well-placed sessions beat all-nighters.
The Memojin method
Five moves to remember for good.
The same five pillars your teachers use — read by the teacher →
01
Capture
5 minutes between your material and your first session
PDFs, photos of your notes, slide decks, YouTube, pasted text — and your Anki decks (.apkg).
AI generation →02
Remember
15 well-placed minutes a day beat an all-nighter
FSRS spaces out your recalls; Memoboost picks the right cards: the nearest exam first, then overdue cards, then today's.
Spaced repetition →03
Vary
The same course, in whichever form suits you
Cards, quizzes, lessons and summaries — one account, two surfaces: your session picks up where it left off.
Every way to revise →04
Prove
You always know whether you're on track
FSRS measures your active memory: the gauge tells you when you're ready for the big day — and a timed mock exam checks it.
Exam mode →05
Support
You're not learning alone
Spaces with friends, spaces from your teacher, messaging with your friends, your teacher and Jin — joining a shared space is free.
Collaborative space →A course goes in. Lasting memory comes out.
Each move builds on the last — and Jin orchestrates the whole thing.
Meet Jin →Meet Jin — what the others don't have
Not a chatbot. A mentor that acts.
Jin knows your course and your progress card by card. It doesn't just answer your questions: it picks the right format at the right moment, and steps in when a concept won't stick.
It spots your gaps before you do — and fills them
It knows your course, not generalities
It adapts to the moment: revision, exam eve, or a slump
Jin
your AI mentor · online
I don't get the Krebs cycle at all 😩
That's normal, it's dense. Picture a recycling plant: each turn of the cycle “burns” one acetyl-CoA and captures the energy as ATP. Shall we take it step by step?
✦ Jin's move
4 extra cards created on the Krebs cycle
added to tomorrow's session · current mastery 44%
✦ Jin's move
Recalls reshuffled ahead of your mock exam in 12 days
shaky concepts first · still on schedule ✓
8:12 · on the bus
Jin fires off a quick quiz
5 minutes of cards on your phone — anything you miss comes back in revision.
17:40 · while walking
Jin serves up the shaky concepts again
A few targeted cards — it pushes exactly where your memory is weakest.
21:05 · 12 days before the exam
Jin moves on to the serious quiz
Marked, explained, timed — the session resumes on your laptop right where your phone left off.
The product at work
Each tool clears one specific blocker.
“Making revision sheets takes me hours”
Your course becomes revision material in 30 seconds
Jin reads your documents and pulls out structured cards, a quiz with explanations and a summary — all of which you can edit or extend by hand.
Import PDFs, photos, slide decks, pasted text, YouTube, Anki (.apkg)
Formatted lessons, LaTeX supported
Cards and quizzes editable by hand
cell_biology_notes.pdf
Jin · 30s
42 memo cards generated
structured by chapter
✓
Quiz · 15 questions
marked + explanations
✓
Printable summary
structured lesson
✓
Every subject
And for yours, what does it look like?
Memojin does not supply the course: it transforms yours, whatever the subject. Twelve examples below — every other subject works the same.
They broke their curve
From school exams to competitive entrance, the method holds.
I imported all my French notes a week before the oral. The quizzes showed me exactly what I thought I knew but didn't.
Théo B.
French oral exam — merit
In my final year of pharmacology the sheer volume is inhuman. Exam mode held a six-week schedule for me — the mock exam a week out took away the fear of the real thing.
Sofia R.
5th year of pharmacy
I create the spaces, my students revise between sessions, and I can see who is falling behind before it's too late. It changed the way I prepare my classes.
Yann D.
Private tutor — 14 students
How to start
Your first session in 5 minutes.
Create your free account
No credit card. Revising and practising uses no AI allowance at all.
Import a course — or an Anki deck
PDF, photos, slide deck, YouTube, pasted text or .apkg: Jin gets it all ready in 30 seconds.
Start your first session
15 minutes is enough. Jin places the following recalls at the right moment.
Your teacher or your friends already use Memojin? Joining a shared space is free — your class's deck is already there, go and join it.
Do you teach?
Your students finally revise. You see everything.
Hand out your courses as teaching spaces, follow your groups' mastery and attendance in real time, schedule shared exams — without a single extra paper to mark.
Explore the teacher plans →
Free trial · no credit card
Year 2 Biology · 28 students
Mastery of the “Photosynthesis” space
updated continuously
76%
7-day attendance
active members
23 / 28
Drop-off alerts
inactive for 10 days
3 students
Pricing
Start for free.
Teacher or trainer? There are dedicated plans with class management and student tracking. See the teacher plans →
Frequently asked questions
Everything about smart revision
It means revising a piece of information just before the moment your brain sorts it out: every spaced recall strengthens the memory trace and flattens the forgetting curve. Memojin uses FSRS, the most refined algorithm in the field: for the same retention, 20 to 30% fewer reviews than a conventional schedule.
Yes: .apkg import is available. Your Anki decks arrive in Memojin with your cards, and you gain FSRS, marked quizzes, exam mode and shared spaces.
Anki is powerful but requires you to write every card by hand and configure the algorithm yourself. Memojin generates cards from your own courses (PDFs, photos, YouTube), applies spaced repetition automatically, and adds marked quizzes, an exam preparation plan and revision with friends — all with a free tier.
Import your material (PDF, slide deck, photo of your notes, YouTube video or pasted text). Jin, Memojin's AI, pulls out a structured lesson, a printable summary sheet, memo cards and a quiz — in about thirty seconds. You can then edit or extend any of it by hand.
Give the date and the content involved: FSRS measures your active memory on that content, the gauge climbs as you revise and tells you when you're ready. A timed mock exam puts you in real conditions before the big day.
Yes: the Start plan includes a monthly AI allowance — cards, imports, summaries and conversations with Jin all draw on it — plus spaced repetition revision, which uses no AI at all. Paid plans raise the AI volume and unlock full exam mode.
PDFs, images and photos of handwritten notes, slide decks, pasted text, YouTube videos and Anki decks (.apkg). Mathematical formulas are supported through LaTeX — handy in medicine, law, science and preparatory courses.
Yes: one account, two surfaces. You start a session on your laptop and it resumes on your phone right where you stopped — a quick quiz on the bus, your cards while walking, a full session before the exam.
Your next exam is being prepared right now.
Import a course, let Jin make the sheets, and watch your forgetting curve flatten out from the very first week.
Create a free account →Free, no credit cardData hosted in Europe