# 에스원 PS 메신저 vs 아이루키 OTID

The clearest difference is update cadence: 에스원 PS 메신저 at every 3 months against 아이루키 OTID's every 16 months. 에스원 PS 메신저 also leads on review sentiment (25% vs 0%). 아이루키 OTID's advantage is iOS requirement (9.0 vs 12.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

에스원 PS 메신저 ships an update every 3 months, 아이루키 OTID every 16 months. The most recent releases landed on October 1, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | 에스원 PS 메신저 | 아이루키 OTID |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **25.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 16 months |
| Monetization | Free | Free |
| Size | 21 MB | 26 MB |
| Requires iOS | 12.0 | **9.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jiransoft](https://appshunter.io/developer/326119493) | [KOREAEXPERT](https://appshunter.io/developer/1161606505) |

## What reviewers say

### 에스원 PS 메신저

[App page](https://appshunter.io/ios/app/ps/id994028235)

This app facilitates secure and convenient internal communication and document sharing for businesses. It offers two message types, read receipts, message recall, and a secure file-sharing environment linked to its parent service.

**Highlights:** Two message types (mail & chat), Read receipts and message recall, Secure internal file sharing, Convenient communication for work, Safe document transfer and utilization

**Features:** macOS Compatibility

**In-app purchases:** none


### 아이루키 OTID

[App page](https://appshunter.io/ios/app/otid/id1377519293)

This app provides one-time random IDs (OTIDs) for secure and convenient user authentication. Forget memorizing IDs and passwords; this solution offers faster logins and enhanced security with unique, time-limited credentials. Registration is simple via QR code scanning.

**Highlights:** One-time random ID generation, Eliminates need to memorize credentials, Faster and easier logins, Enhanced security with time-limited IDs, Simple QR code registration, Mobile and web auto-login

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

**In-app purchases:** none


## Frequently asked questions

### Is 에스원 PS 메신저 free?

에스원 PS 메신저 is free to download, with no in-app purchases.

### Is 아이루키 OTID free?

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

### Do 에스원 PS 메신저 or 아이루키 OTID have ads?

Neither 에스원 PS 메신저 nor 아이루키 OTID shows ads.

### Which is updated more often, 에스원 PS 메신저 or 아이루키 OTID?

에스원 PS 메신저 ships an update every 3 months, and 아이루키 OTID every 16 months. Most recently, 에스원 PS 메신저 was updated on October 1, 2026 and 아이루키 OTID on September 26, 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.*