# [B단계] 스마트 이야기독서 vs K

The clearest difference is in-app purchases: [B단계] 스마트 이야기독서 at none against K's 1. K's advantage is update cadence (every 6 weeks vs every 12 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. K sells 1 in-app purchase, starting at $5.99 per month. [B단계] 스마트 이야기독서 asks for nothing beyond the download.

[B단계] 스마트 이야기독서 ships an update every 12 months, K every 6 weeks. The most recent releases landed on October 29, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | [B단계] 스마트 이야기독서 | K |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 6 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 303 MB | 117 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [(주)교원구몬](https://appshunter.io/developer/1800639087) | [Siwonschool](https://appshunter.io/developer/473647838) |

## What reviewers say

### [B단계] 스마트 이야기독서

[App page](https://appshunter.io/ios/app/b/id1208047214)

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

**In-app purchases:** none


### K

[App page](https://appshunter.io/ios/app/k-readingbook/id6469670688)

This app uses AI to assess Korean language and TOPIK exam readiness, providing personalized reading materials to boost vocabulary and comprehension. It offers practice tests and evaluations to track progress and improve Korean proficiency.

**Highlights:** AI-driven Korean language assessment, Customized reading material recommendations, TOPIK level 1-6 vocabulary focus, Diverse reading materials (literature to modern culture), TOPIK-style level tests and evaluations, Real-time Korean level and skill tracking

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One month | $5.99 | per month |


## Frequently asked questions

### Is [B단계] 스마트 이야기독서 free?

[B단계] 스마트 이야기독서 is free to download, with no in-app purchases.

### Is K free?

K is free to download, with in-app purchases available.

### Do [B단계] 스마트 이야기독서 or K have ads?

Neither [B단계] 스마트 이야기독서 nor K shows ads.

### Which is updated more often, [B단계] 스마트 이야기독서 or K?

[B단계] 스마트 이야기독서 ships an update every 12 months, and K every 6 weeks. Most recently, [B단계] 스마트 이야기독서 was updated on October 29, 2026 and K on October 15, 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.*