# 에스원 PS 메신저 vs KAI Login

The clearest difference is update cadence: KAI Login at weekly against 에스원 PS 메신저's every 3 months. 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.

에스원 PS 메신저 ships an update every 3 months, KAI Login weekly. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 에스원 PS 메신저 | KAI Login |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Free | — |
| Size | 11 MB | 37 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jiransoft](https://appshunter.io/developer/326119493) | [AirCUVE Inc.](https://appshunter.io/developer/898126646) |

## 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, Vision Pro support

**In-app purchases:** none


### KAI Login

[App page](https://appshunter.io/ios/app/kai-login/id6790691998)

**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 KAI Login free?

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

### Do 에스원 PS 메신저 or KAI Login have ads?

Neither 에스원 PS 메신저 nor KAI Login shows ads.

### Which is updated more often, 에스원 PS 메신저 or KAI Login?

에스원 PS 메신저 ships an update every 3 months, and KAI Login weekly. Most recently, 에스원 PS 메신저 was updated on November 1, 2026 and KAI Login on October 31, 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.*