# 벼락치기AI vs AI Study Sheet

The clearest difference is review sentiment: AI Study Sheet at 100% against 벼락치기AI's 40%. AI Study Sheet also leads on iOS requirement (16.0 vs 18.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. 벼락치기AI sells 1 in-app purchase, starting at $9.99 per month and AI Study Sheet sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 3 days. The most recent releases landed on October 20, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | 벼락치기AI | AI Study Sheet |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 40.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 days | Every 3 days |
| Monetization | Freemium | Free with in-app purchases |
| Size | 38 MB | 8 MB |
| Requires iOS | 18.0 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [2Labs](https://appshunter.io/developer/1089573745) | [Masaki Iino](https://appshunter.io/developer/6778272211) |

## What reviewers say

### 벼락치기AI

[App page](https://appshunter.io/ios/app/ai-pdf/id6759626655)

This AI-powered study tool helps university students prepare for exams by analyzing lecture materials. It automatically generates summaries, flashcards, quizzes, and mock tests from uploaded PDFs and PPTs, focusing on high-probability exam topics.

**Highlights:** AI-powered exam summaries, Key topic identification, Flashcard generation, Automatic quiz creation, Mock test generation, Error analysis notebook, Study progress checklist

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro 플랜 | $9.99 | per month |


### AI Study Sheet

[App page](https://appshunter.io/ios/app/ai-study-sheet-active-recall/id6782023263)

Transform existing study materials into active-recall quizzes with AI. Snap photos or import PDFs, and the app automatically masks key terms for spaced repetition. Review materials with an auto-reveal mode that adapts to your learning behavior.

**Highlights:** Import photos and PDFs, Automatic AI masking of key terms, Review reminders, Auto Study Mode with sequential reveal, Adaptive learning based on study behavior, Organized study material library, Flexible material viewing and editing

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Saves | $4.99 | one-time |


## Frequently asked questions

### Is 벼락치기AI free?

벼락치기AI is free to download, with in-app purchases available.

### Is AI Study Sheet free?

AI Study Sheet is free to download, with in-app purchases available.

### Do 벼락치기AI or AI Study Sheet have ads?

Neither 벼락치기AI nor AI Study Sheet shows ads.

### Which is updated more often, 벼락치기AI or AI Study Sheet?

벼락치기AI ships an update every 3 days, and AI Study Sheet every 3 days. Most recently, 벼락치기AI was updated on October 20, 2026 and AI Study Sheet on October 15, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*