# 리더스 스터디(Leaders Study) vs 백신화학

The clearest difference is update cadence: 백신화학 at weekly against 리더스 스터디(Leaders Study)'s every 3 months. 리더스 스터디(Leaders Study)'s advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

리더스 스터디(Leaders Study) ships an update every 3 months, 백신화학 weekly. The most recent releases landed on October 25, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | 리더스 스터디(Leaders Study) | 백신화학 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Size | 134 MB | 34 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Tobesmart,inc](https://appshunter.io/developer/1449538915) | [EduU Learning, Inc.](https://appshunter.io/developer/1862370815) |

## What reviewers say

### 리더스 스터디(Leaders Study)

[App page](https://appshunter.io/ios/app/leaders-study/id1479362963)

**In-app purchases:** none


### 백신화학

[App page](https://appshunter.io/ios/app/id6786100210)

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

**In-app purchases:** none


## Frequently asked questions

### Is 리더스 스터디(Leaders Study) free?

리더스 스터디(Leaders Study) is free to download, with no in-app purchases.

### Is 백신화학 free?

백신화학 is free to download, with no in-app purchases.

### Do 리더스 스터디(Leaders Study) or 백신화학 have ads?

Neither 리더스 스터디(Leaders Study) nor 백신화학 shows ads.

### Which is updated more often, 리더스 스터디(Leaders Study) or 백신화학?

리더스 스터디(Leaders Study) ships an update every 3 months, and 백신화학 weekly. Most recently, 리더스 스터디(Leaders Study) was updated on October 25, 2026 and 백신화학 on October 8, 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.*