# S2B알리미 vs 공공강사

The clearest difference is ads: S2B알리미 at none against 공공강사's shown. S2B알리미 also leads on iOS requirement (9 vs 15.5). 공공강사's advantage is update cadence (fortnightly vs every 3 months). On price, 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.

S2B알리미 ships an update every 3 months, 공공강사 fortnightly. The most recent releases landed on October 18, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | S2B알리미 | 공공강사 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 3 MB | 39 MB |
| Requires iOS | **9** | 15.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KTCU](https://appshunter.io/developer/427138022) | [Jeyoung Park](https://appshunter.io/developer/1764231696) |

## What reviewers say

### S2B알리미

[App page](https://appshunter.io/ios/app/s2b/id1291194545)

Receive important S2B service notifications directly on your mobile device. This app provides a list of alerts, message search, and customizable notification settings. It ensures you stay informed about service updates with an etiquette time feature.

**Highlights:** Push notification service, Notification list and details, Message search functionality, Category-based message settings, Etiquette time setting

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

**In-app purchases:** none


### 공공강사

[App page](https://appshunter.io/ios/app/id6654905319)

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

**In-app purchases:** none


## Frequently asked questions

### Is S2B알리미 free?

S2B알리미 is free to download, with no in-app purchases.

### Is 공공강사 free?

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

### Do S2B알리미 or 공공강사 have ads?

공공강사 shows ads; S2B알리미 does not.

### Which is updated more often, S2B알리미 or 공공강사?

S2B알리미 ships an update every 3 months, and 공공강사 fortnightly. Most recently, S2B알리미 was updated on October 18, 2026 and 공공강사 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.*