# KTT 자가보안 vs 아이스쿨(AI SCHOOL)

The clearest difference is update cadence: 아이스쿨(AI SCHOOL) at every 6 weeks against KTT 자가보안's every 9 months. KTT 자가보안's advantage is iOS requirement (11.0 vs 14.0). 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.

KTT 자가보안 ships an update every 9 months, 아이스쿨(AI SCHOOL) every 6 weeks. The most recent releases landed on October 20, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | KTT 자가보안 | 아이스쿨(AI SCHOOL) |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 6 weeks** |
| Size | 44 MB | 52 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MGV Security System](https://appshunter.io/developer/1442050029) | [KUK HYEONG KIM](https://appshunter.io/developer/1037784257) |

## What reviewers say

### KTT 자가보안

[App page](https://appshunter.io/ios/app/ktt/id6473464936)

**Features:** macOS Compatibility

**In-app purchases:** none


### 아이스쿨(AI SCHOOL)

[App page](https://appshunter.io/ios/app/ai-school/id6738344725)

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

**In-app purchases:** none


## Frequently asked questions

### Is KTT 자가보안 free?

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

### Is 아이스쿨(AI SCHOOL) free?

아이스쿨(AI SCHOOL) is free to download, with no in-app purchases.

### Do KTT 자가보안 or 아이스쿨(AI SCHOOL) have ads?

Neither KTT 자가보안 nor 아이스쿨(AI SCHOOL) shows ads.

### Which is updated more often, KTT 자가보안 or 아이스쿨(AI SCHOOL)?

KTT 자가보안 ships an update every 9 months, and 아이스쿨(AI SCHOOL) every 6 weeks. Most recently, KTT 자가보안 was updated on October 20, 2026 and 아이스쿨(AI SCHOOL) on October 7, 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.*