Comparison

ContextVoca vs 오답노트AI

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ContextVoca

Features
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ContextVoca uses AI to turn photos and text into your personal vocabulary list — then quizzes you until you own those words. [SNAP - LEARN - REMEMBER] Point your camera at a book, menu, sign, or any text. Our OCR engine reads it, and our AI extracts the vocabulary words most worth learning. No more manual lookup — just learn. [AI-POWERED WORD EXTRACTION] ContextVoca's LLM engine analyzes your captured text and selects the most meaningful words for your level. It strips away common words and surfaces the ones that will expand your vocabulary fastest. [SMART QUIZ SYSTEM] Our adaptive quiz engine schedules reviews based on how well you know each word. The more you struggle with a word, the more often it appears — so you never forget what you've worked hard to learn. [CONTEXT-BASED LEARNING] Every word is stored with the sentence or phrase it came from. Seeing a word in context is proven to dramatically improve retention compared to isolated flashcards. [KEY FEATURES] - OCR text recognition from photos and camera - AI keyword extraction - Spaced repetition quiz (multiple choice + fill-in) - Context sentences saved with every word - Vocabulary statistics and learning streaks - Word tagging and custom categories - Available in English, Korean, Japanese, and Chinese [SUBSCRIPTION PLANS] - Free — up to 100 words, core features - Basic — up to 1,000 words, all features (monthly or yearly auto-renewing subscription) - Pro — unlimited words, all features, priority support (monthly or yearly auto-renewing subscription) Prices are shown on the in-app subscription screen. Payment is charged to your Apple ID account at confirmation of purchase. The subscription automatically renews unless it is canceled at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscription in your Apple ID account settings after purchase. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://contextvoca.app/en/privacy/

About

오답노트AI

This app uses AI to automatically create personalized study notes and practice tests from your incorrect answers. Simply photograph your mistakes, and the AI will transcribe them, organize them by subject, and generate similar problems for further practice. It also offers an AI tutor for instant help and tracks your progress with weekly reports.

Highlights
  • AI-generated study notes from photos
  • Automatic organization by subject and unit
  • Personalized practice tests with similar problems
  • AI tutor for instant help with questions
  • Spaced repetition for review
  • Weekly progress reports
  • Printable PDF test creation
Features
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찍기만 하세요. 오답노트는 AI가 만듭니다. 틀린 문제를 오려 붙이고 옮겨 적다 보면, 정작 다시 풀 시간이 없습니다. 오답노트AI는 사진 한 장으로 그 과정을 대신합니다. 이렇게 작동해요 • 틀린 문제를 찍고 영역만 맞추면 끝 — 지문과 보기는 AI가 읽어 옮겨 적습니다 • 그래프·도형처럼 눈으로 봐야 아는 값은 맞게 읽었는지 한 번 물어봅니다 • 과목과 단원으로 알아서 정리되고, 다시 볼 때가 되면 올라옵니다 정답부터 보여주지 않아요 • 힌트 → 풀이 방향 → 단계 해설 → 정답 순서로 하나씩 열립니다 • 필요한 만큼만 보고 다시 풀어봐도 됩니다 • 설명 방식과 말투를 고르면 해설도 그 결대로 옵니다 막히면 AI튜터에게 바로 • 공부하다 막힌 문제를 찍어서 바로 물어보세요 — 오답 등록 없이도 됩니다 • 대화는 저장돼요. 어제 하던 질문을 오늘 이어서 할 수 있어요 • 등록해 둔 내 문제를 불러와 이어서 질문할 수도 있어요 복습이 알아서 돌아와요 • 정답을 확인한 문제는 다음 날 "다시 풀 문제"로 돌아옵니다 • 맞히면 3일 뒤 한 번 더, 두 번 연속 맞히면 학습 완료 • 다시 풀 문제가 있는 날 저녁에 알려드려요 (시각 변경·끄기 가능) 같은 문제를 또 푸는 대신 • 숫자와 조건을 바꾼 유사문제를 만들어 줍니다 • 앱이 직접 풀어보고 정답이 맞은 문제만 내보냅니다 내 오답만 모은 시험지 • 틀린 문제만 골라 한 장으로 묶어 시험처럼 풀 수 있어요 • 유사문제로 바꿔 출제하면 채점과 성적표까지 나옵니다 • PDF로 뽑아 인쇄해서 손으로 풀 수도 있습니다 (정답지는 맨 뒤에 따로) 일주일의 노력이 쌓입니다 • 일요일 아침, 한 주 동안 등록하고 복습한 기록을 주간 리포트로 정리해 드려요 • 단원별 오답 수와 며칠째 이어왔는지, 어디가 약한지도 한눈에 오답노트AI Pro (선택 구독) 무제한 오답 정리, 무제한 유사문제, 무제한 AI 질문, 문제지 PDF 추출을 이용할 수 있어요. • 월간(₩9,900) 또는 연간(₩79,000) 자동갱신 구독이며, 기간 종료 24시간 전까지 해지하지 않으면 자동 갱신됩니다 • 결제는 Apple ID 계정으로 청구되며, 구독 관리·해지는 App Store 설정에서 언제든 가능합니다 • 이용약관: https://odapnote.ai.kr/terms • 개인정보처리방침: https://odapnote.ai.kr/privacy

Screenshots

ContextVoca4 screens
오답노트AI4 screens

Verdict

The call

The clearest difference is in-app purchases: 오답노트AI at none against ContextVoca's 5. 오답노트AI also leads on update cadence (every 2 days vs weekly). ContextVoca's advantage is iOS requirement (16.4 vs 18.0). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. ContextVoca sells 5 in-app purchases, starting at $5.00 per month. 오답노트AI asks for nothing beyond the download.

UpkeepUpdate frequency

ContextVoca ships an update weekly, 오답노트AI every 2 days. The most recent releases landed on October 16, 2026 and October 7, 2026 respectively.

Scorecard3 real differences · 5 level
ContextVoca versus 오답노트AI: the parameters behind the verdict, then further details
ParameterContextVoca오답노트AI
PriceFreeFree
Positive reviews—100.0% of reviews
Update frequencyWeeklyEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Freemium
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.4 — better18.0
Further details — not scored
Size70 MB33 MB
Age rating4+4+
DeveloperJunghyun Park2Labs

In-app purchases

5 purchases

ContextVoca

Subscriptions4
  • Basic Monthly$5.001 Month
  • Pro Monthly$10.001 Month
  • Basic Yearly$35.001 Year
Show 1 more
  • Pro Yearly$70.001 Year
One-time1
  • Lifetime Access$99.00
None

오답노트AI

No in-app purchases

Questions

Is ContextVoca free?
ContextVoca is free to download, with in-app purchases available.
Is 오답노트AI free?
오답노트AI is free to download, with no in-app purchases.
Do ContextVoca or 오답노트AI have ads?
Neither ContextVoca nor 오답노트AI shows ads.
Which is updated more often, ContextVoca or 오답노트AI?
ContextVoca ships an update weekly, and 오답노트AI every 2 days. Most recently, ContextVoca was updated on October 16, 2026 and 오답노트AI on October 7, 2026.

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