# 4 Plus 4 vs Chaipang Subtraction

The clearest difference is update cadence: 4 Plus 4 at monthly against Chaipang Subtraction's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 4 Plus 4 sells 1 one-off in-app purchase and Chaipang Subtraction sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

4 Plus 4 ships an update monthly, Chaipang Subtraction every 3 months. The most recent releases landed on July 24, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | 4 Plus 4 | Chaipang Subtraction |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/4-plus-4/id1602292243/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Monetization | Free | — |
| Size | 38 MB | 136 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Patrick Koehnen](https://appshunter.io/developer/431219217) | [Wecref Co., Ltd.](https://appshunter.io/developer/1570555584) |

## What reviewers say

### 4 Plus 4

[App page](https://appshunter.io/ios/app/4-plus-4/id1602292243)

This app offers a clear, step-by-step approach to learning mathematics. It features structured modules for number basics, arithmetic, and fractions, with playful sections to apply learned concepts. Designed to make math understandable and enjoyable, it's ideal for beginners and for refreshing knowledge.

**Highlights:** Clear learning modules, Step-by-step guidance, Structured practice, Playful application sections, Progress tracking, Ad-free experience

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Inclusive | $1.99 | one-time |


### Chaipang Subtraction

[App page](https://appshunter.io/ios/app/chaipang-subtraction/id1614401871)

**Features:** macOS Compatibility

**In-app purchases (1)**

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


## Frequently asked questions

### Is 4 Plus 4 free?

4 Plus 4 is free to download, with in-app purchases available.

### Is Chaipang Subtraction free?

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

### Do 4 Plus 4 or Chaipang Subtraction have ads?

Neither 4 Plus 4 nor Chaipang Subtraction shows ads.

### Which is updated more often, 4 Plus 4 or Chaipang Subtraction?

4 Plus 4 ships an update monthly, and Chaipang Subtraction every 3 months. Most recently, 4 Plus 4 was updated on July 24, 2026 and Chaipang Subtraction on September 19, 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.*