# [B단계] 스마트 이야기독서 vs Chaipang Addition

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

Both are free to download. Chaipang Addition sells 1 one-off in-app purchase. [B단계] 스마트 이야기독서 asks for nothing beyond the download.

[B단계] 스마트 이야기독서 ships an update every 12 months, Chaipang Addition fortnightly. The most recent releases landed on October 17, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | [B단계] 스마트 이야기독서 | Chaipang Addition |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 12 months | **Fortnightly** |
| Size | 303 MB | 136 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [(주)교원구몬](https://appshunter.io/developer/1800639087) | [Wecref Co., Ltd.](https://appshunter.io/developer/1570555584) |

## 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


### Chaipang Addition

[App page](https://appshunter.io/ios/app/chaipang-addition/id1608482068)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 차이팡 덧셈 광고제거 | $2.99 | one-time |


## Frequently asked questions

### Is [B단계] 스마트 이야기독서 free?

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

### Is Chaipang Addition free?

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

### Do [B단계] 스마트 이야기독서 or Chaipang Addition have ads?

Neither [B단계] 스마트 이야기독서 nor Chaipang Addition shows ads.

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

[B단계] 스마트 이야기독서 ships an update every 12 months, and Chaipang Addition fortnightly. Most recently, [B단계] 스마트 이야기독서 was updated on October 17, 2026 and Chaipang Addition on October 27, 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.*