AI Study Sheet vs 문득
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AI Study Sheet
Transform your study materials into interactive flashcards without retyping. This app uses AI to hide key terms in photos and PDFs, helping you memorize information for exams and courses. It offers customizable study modes and personalized review recommendations.
- AI-powered term masking
- Import from photos and PDFs
- Customizable study modes
- Personalized review recommendations
- Organize with folders and search
- Share editable study materials
- On-device AI processing
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Turn the materials you already study into hide-and-reveal practice. AI Study Sheet hides key terms in photos and PDFs, helping you recall what you learned in class, a course or workplace training. Keep the original page layout instead of retyping everything into flashcards. FROM CLASS NOTES TO CERTIFICATION STUDY Import textbook pages, class handouts, lecture notes and course PDFs. Review vocabulary, definitions, dates and key concepts for quizzes, midterms, finals or certification exams. Use it alongside school, college, tutoring and professional courses for the memorization part of learning. LESS SETUP, FEWER TAPS AI selects key terms to hide while preserving the text, diagrams and layout around them. Check and edit the masks whenever you need to. In Auto mode, the highlighted mask opens after 3 seconds to reveal the answer. Try to recall it before it appears. Prefer your own pace? Use Manual mode to reveal answers yourself. REVIEW BASED ON WHAT YOU REMEMBER After studying, record whether you remembered each page, felt unsure or need more practice. Your ratings and study activity help the app recommend what to review next. Enable notifications to open Auto study directly when review material is available. Choose 1–10 pages per session and resume an interrupted session from where you left off. ORGANIZE, SHARE AND BACK UP Find materials with search and folders, and look back at your study history. Share editable masked materials so someone else can study them too. Back up materials, masks and study history to a file and restore them when needed. PRIVATE STUDY ON YOUR DEVICE Our custom AI masking runs entirely on your device. Study with confidence without sending your materials or OCR text to external servers. OPTIONAL STUDYPLUS INTEGRATION After connecting to Studyplus and giving consent, your study duration, session end time and a generic comment can be recorded automatically when each new study session ends. You can turn automatic recording off at any time in Settings. FREE TO START, ONE-TIME UPGRADE No ads. Save up to 3 pages at first, then up to 10 after completing your first study session. The optional one-time upgrade removes the save limit and lets you send shared materials. Free users can receive shared materials within their save limit. Purchase restoration is supported. No subscription. Text recognition and automatic masking depend on the quality and content of your materials. Check and edit the results as needed.
문득
This app helps students review study materials without dedicated study time. It uses AI to generate quizzes from PDFs, Notion pages, or photos, and presents them on your lock screen for effortless learning. Track your progress and get customized quizzes to reinforce weak areas.
- AI quiz generation from PDFs, Notion, and photos
- Lock screen review cards
- Automated question and answer creation
- Learning reports and weakness analysis
- Customized quiz generation for weak areas
- No manual card creation required
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우리가 벼락치기만 하게 되는 이유는 간단합니다. 그날 배운 건 그날 바로 복습하는 게 가장 좋지만, 공부할 내용은 매주 새롭게 쌓입니다. 따로 공부할 시간은 없고, 무엇보다 너무나 귀찮아서 미루게 됩니다. 결국 우리는 항상 벼락치기를 하고, 다음 번엔 미리미리 공부하겠다고 다짐하죠. 하지만 그것은 항상 다짐으로 끝나고, 습관으로 이어지지 못합니다. 공부할 게 너무나 많은 학생들이 별도로 시간을 많이 쓰지 않고도, 의식적으로 공부할 노력을 들이지 않고도 언제 어디서든 누구나 공부한 내용을 쉽게 복습할 수 있도록 만든 앱이 바로 문득입니다. 문득은 강의자료 PDF나 사진과 같은 정리한 학습 내용을 바탕으로 자동으로 AI 퀴즈를 생성하고 그것을 잠금화면에서 풀게 하는 앱으로, 평소 책 펼 힘도 없이 휴대폰만 보게 되는 날에도 누구나 공부가 되게 하는 — 기존에 없던 학습 방식을 제공합니다. 한 바퀴를 다 풀면 학습 리포트로 내가 어느 개념이 약한지 분석해주고, 약점 보완 맞춤형 퀴즈 생성까지 도와줍니다. ■ 카드를 만들지 않아도 되니까 PDF·PPTX 파일, 사진, 노션 페이지만 연결하세요. 문제, 보기, 정답까지 AI가 자동으로 만들어 드려요. 카드 만드는 시간 0분, 공부는 바로 시작. ■ 앱을 열지 않아도 복습되니까 잠금화면에 복습 카드가 나타나요. 화면을 켤 때마다 한 문제씩 — 하루에도 수십 번 생기는 자투리 순간이 전부 공부 시간이 됩니다. ■ 약점 위주로 다시 보완해주니까 회독마다 학습 리포트로 개념별 약점과 강점을 짚어주고, 약한 부분 위주로 퀴즈를 다시 만들어 드려요.
Screenshots
Verdict
The clearest difference is review sentiment: AI Study Sheet at 100% against 문득's 50%. On price, update cadence, ads and in-app purchases 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
Both are free to download. AI Study Sheet sells 1 one-off in-app purchase and 문득 sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
AI Study Sheet ships an update every 4 days, 문득 every 3 days. Both last shipped on November 1, 2026.
| Parameter | AI Study Sheet | 문득 |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews — better | 50.0% of reviews |
| Update frequency | Every 4 days | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.0 — better | 17.2 |
| Further details — not scored | ||
| Size | 9 MB | 66 MB |
| Age rating | 4+ | 12+ |
| Developer | Masaki Iino | JIHWAN YEOM |
Customer experience
AI Study Sheet
문득
In-app purchases
AI Study Sheet
- Unlimited Saves$4.99
문득
- 문득 베이직$1.991 Month
- 크레딧 10개$1.99









