# 리더스 스터디(Leaders Study) vs 오티티스위치

The clearest difference is iOS requirement: 리더스 스터디(Leaders Study) at 13.0 against 오티티스위치's 15.6. On price, update cadence, ads and in-app purchases 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, 오티티스위치 every 6 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | 리더스 스터디(Leaders Study) | 오티티스위치 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Size | 134 MB | 68 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tobesmart,inc](https://appshunter.io/developer/1449538915) | [OHRAE Inc.](https://appshunter.io/developer/1161656350) |

## What reviewers say

### 리더스 스터디(Leaders Study)

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

**In-app purchases:** none


### 오티티스위치

[App page](https://appshunter.io/ios/app/id6762985213)

**Features:** macOS Compatibility

**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 오티티스위치 free?

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

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

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

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

리더스 스터디(Leaders Study) ships an update every 3 months, and 오티티스위치 every 6 weeks. Most recently, 리더스 스터디(Leaders Study) was updated on October 25, 2026 and 오티티스위치 on October 25, 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.*