# 1st Grade Math vs Chaipang Subtraction

The clearest difference is update cadence: 1st Grade Math at every 3 weeks against Chaipang Subtraction's every 3 months. Chaipang Subtraction's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 1st Grade Math sells 1 in-app purchase, starting at $4.99 per month and Chaipang Subtraction sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

1st Grade Math ships an update every 3 weeks, Chaipang Subtraction every 3 months. The most recent releases landed on September 15, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | 1st Grade Math | Chaipang Subtraction |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Size | 187 MB | 136 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Math Galaxy](https://appshunter.io/developer/500490521) | [Wecref Co., Ltd.](https://appshunter.io/developer/1570555584) |

## What reviewers say

### 1st Grade Math

[App page](https://appshunter.io/ios/app/1st-grade-math-math-galaxy/id1538603814)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1st Grade Math - Math Galaxy | $4.99 | per month |


### 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 1st Grade Math free?

1st Grade Math 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 1st Grade Math or Chaipang Subtraction have ads?

Neither 1st Grade Math nor Chaipang Subtraction shows ads.

### Which is updated more often, 1st Grade Math or Chaipang Subtraction?

1st Grade Math ships an update every 3 weeks, and Chaipang Subtraction every 3 months. Most recently, 1st Grade Math was updated on September 15, 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.*