# 벼락치기AI vs Phedy

The clearest difference is update cadence: 벼락치기AI at every 3 days against Phedy's every 3 weeks. Phedy's advantage is iOS requirement (15.0 vs 18.0). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. 벼락치기AI sells 2 in-app purchases, starting at $9.99 per month and Phedy sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

벼락치기AI ships an update every 3 days, Phedy every 3 weeks. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 벼락치기AI | Phedy |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 42.9% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 3 weeks |
| Monetization | Freemium | Free with in-app purchases |
| Size | 38 MB | 3 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [2Labs](https://appshunter.io/developer/1089573745) | [Room821](https://appshunter.io/developer/1707410548) |

## 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 (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 벼락치기AI Pro 월간 플랜 | $9.99 | per month |
| 벼락치기AI Pro 연간 플랜 | $89.99 | per year |


### Phedy

[App page](https://appshunter.io/ios/app/phedy/id6760993986)

Transform your study materials into personalized learning tools with AI. Generate quizzes, summary notes, and instant explanations from PDFs, videos, and lecture recordings. Track progress, practice weak areas, and manage grades.

**Highlights:** AI Quiz Generator, AI Cheat Notes, AI Lasso Explanations, Lecture Recording to Text, Wrong Answer Review, Past Exam Study Material Generator, Scientific and GPA Calculator

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1일 이용권 | $2.99 | one-time |
| 14일 이용권 | $6.99 | one-time |
| 30일 이용권 | $9.99 | one-time |


## Frequently asked questions

### Is 벼락치기AI free?

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

### Is Phedy free?

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

### Do 벼락치기AI or Phedy have ads?

Neither 벼락치기AI nor Phedy shows ads.

### Which is updated more often, 벼락치기AI or Phedy?

벼락치기AI ships an update every 3 days, and Phedy every 3 weeks. Most recently, 벼락치기AI was updated on October 28, 2026 and Phedy on October 24, 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.*