IM VOCA
🏅
Patent Pending · KR 10-2026-0127089
AI Vocabulary Book for English Readers
Read books & make
vocabulary truly yours
vocabulary truly yours
Take a photo of any page and AI automatically extracts difficult words.
Learn in context, retain with Ebbinghaus spaced repetition.
Get Started
Learn in context, retain with Ebbinghaus spaced repetition.
imvoca.app
How It Works
1
Shoot Page
Photo of your book page
›
2
AI Extraction
Auto-sorted by difficulty
›
3
Save Words
Select only unknown words
›
4
Flashcards
Flashcards + Quiz
›
5
Auto Review
Ebbinghaus schedule
How to Study
📖 Learn the words first, read the next day
The most effective way to use IM VOCA is previewing.
Memorize the difficult words from tomorrow's page today,
and the next day that page reads effortlessly.
Memorize the difficult words from tomorrow's page today,
and the next day that page reads effortlessly.
1
Today — decide tomorrow's reading
e.g. 30 min of daily reading ≈ 10 pages. Pick the page you'll read tomorrow.
2
Take a photo of that page
AI pulls only the hard words from that page, sorted by difficulty, into a word list.
3
Memorize only the words you don't know
Skip the words you know. Just a small set to learn with cards and quizzes — no overload.
4
The next day — read that page
You already know the words, so it flows. Meeting them again in the book locks them in.
💡 Why it works: Ordinary word apps rarely let you meet a word again, so it fades fast.
But this method has you meet the word for real in the book the very next day.
Once while previewing, again while reading, and again through Ebbinghaus review — three encounters turn it into long-term memory.
Finding Your Right Book
Is your book too hard — or too easy?
A book reads best — and teaches most — when it's at just the right level. Here's a simple way to check with IM VOCA.
📷 How to test
Scan about 5 pages of the book you're considering, then count how many of the 20 words on a page you don't know.
🎯
5–10 unknown words — just right
The sweet spot: enjoyable to read and rewarding to learn. Dive right in!
🌊
Fewer than 5 — smooth reading
Great for relaxed reading rather than study. Enjoy the story!
⛰️
15 or more — a bit challenging
Start with something easier first. Once you build confidence, come back — it'll read much more smoothly.
Key Features
1
AI Word Extraction
One photo automatically extracts words sorted by difficulty
2
Context-Based Meanings
Shows the meaning as used in your specific book
3
Flashcards + Quiz
Memorize with flashcards and test with multiple choice quiz
4
Ebbinghaus Review
Auto reminders before forgetting — build long-term memory
5
Hall of Fame
Climb the leaderboard by words learned — stay motivated with friends
① CEFR International Language Standard
🎓
What is CEFR?
Common European Framework of Reference for Languages (CEFR) is a globally recognized standard for measuring language proficiency.
Major tests like IELTS, TOEFL, Cambridge and educational institutions worldwide use this standard.
Major tests like IELTS, TOEFL, Cambridge and educational institutions worldwide use this standard.
A1
A2
Beginner (A1-A2) — Basic words, simple daily conversation
B1
B2
Intermediate (B1-B2) — Travel and work communication
C1
C2
Advanced (C1-C2) — Reading books and papers, fluent expression
📱 How IM VOCA uses CEFR
When extracting words, AI automatically classifies by CEFR. C1~C2 hard words first, then B2 and B1.
Each word card shows CEFR C1 CEFR B2 level badges so you can see difficulty at a glance.
Each word card shows CEFR C1 CEFR B2 level badges so you can see difficulty at a glance.
② Comprehensible Input
📖
Comprehensible Input Theory
Proposed by linguist Dr. Stephen Krashen
Language is acquired naturally when understood in context, not when forced.
Words learned in context are remembered far longer than words memorized alone.
Words from your own book are even more effective — you already know the context.
Words learned in context are remembered far longer than words memorized alone.
Words from your own book are even more effective — you already know the context.
📱 How IM VOCA applies this
Words are saved with both base meaning + contextual meaning from your book.
Both meanings appear on the flashcard back, helping you remember words in context.
Both meanings appear on the flashcard back, helping you remember words in context.
③ Flashcard Method
🃏
Cycle Repetition Method
Leitner System · Testing Effect
Don't try to perfect each word before moving on.
Quickly cycle through all words, removing known ones with ○ — only unknown words stay.
The key is ending up focused only on words you truly don't know.
Quickly cycle through all words, removing known ones with ○ — only unknown words stay.
The key is ending up focused only on words you truly don't know.
Flashcard Learning Flow
📚
All Words
Round 1
Round 1
→
○ Known
Removed next cycle
Removed next cycle
✕ Unknown
Kept next cycle
Kept next cycle
→
🎯
Unknown Words
Repeated
Repeated
→
✅
Fully Memorized!
💡 Research shows: Recalling a word once with flashcards beats reading a list 10 times.
The brain stores memories stronger during the "wait... what was it? Oh!" moment. — Testing Effect, University of Washington Research
The brain stores memories stronger during the "wait... what was it? Oh!" moment. — Testing Effect, University of Washington Research
④ Ebbinghaus Forgetting Curve
📊 Scientifically Proven Review Schedule
19th century German psychologist Hermann Ebbinghaus studied how much people forget over time as memory fades over time.
He found that after learning, people forget 42% in 20 minutes, 67% in one day, and 79% in a month.
But reviewing just before forgetting strengthens the memory and extends the time until the next forgetting.
He found that after learning, people forget 42% in 20 minutes, 67% in one day, and 79% in a month.
But reviewing just before forgetting strengthens the memory and extends the time until the next forgetting.
Memory Retention Rate (without review vs With IM VOCA)
Without Review
With IM VOCA
IM VOCA Auto Review Schedule
Day 0
+1 day
+2 days
+3 days
+6 days
+15 days
+30 days
Complete flashcards and your review schedule auto-registers. Review before forgetting to build long-term memory.
⑤ Hall of Fame
🏆 Score by word difficulty
Saving more words doesn't automatically make you #1.
Harder words earn more points.
So the more you tackle genuinely difficult words from real books, the higher you climb.
Harder words earn more points.
So the more you tackle genuinely difficult words from real books, the higher you climb.
Points by difficulty (CEFR)
A2
Beginner
1 pt
B1
Intermediate
2 pts
B2
Upper-intermediate
3 pts
C1
Advanced · college/novel level
4 pts
C2
Mastery · native level
5 pts
💡 For example, 10 C1 words (40 pts) score 4× higher than 10 A2 words (10 pts).
Your rank score is the sum of all your saved words' points, and your perfect-review (⚡) count is shown too.
Competing with friends pushes you to take on harder words.
Why IM VOCA is Different
Feature
IM VOCA
Other Apps
Book page photo → Word extraction
✅
Partial
Context-based meaning
✅
❌
CEFR auto-classification
✅
❌
Ebbinghaus 6-step review
✅
Partial
"Don't force memorization.
Make vocabulary yours naturally through reading."
🏅 Core technology Patent Pending (KR Application No. 10-2026-0127089):
"Method and System for Generating and Managing AI-Based Personalized Vocabulary Learning Data"
"Method and System for Generating and Managing AI-Based Personalized Vocabulary Learning Data"