# Chaipang Addition vs Aritmo

The clearest difference is ads: Chaipang Addition at none against Aritmo's shown. Chaipang Addition also leads on iOS requirement (13.0 vs 16.0). Aritmo's advantage is update cadence (every 2 days vs fortnightly). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Chaipang Addition sells 1 one-off in-app purchase and Aritmo sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Chaipang Addition ships an update fortnightly, Aritmo every 2 days. The most recent releases landed on October 27, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Chaipang Addition | Aritmo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Every 2 days** |
| Size | 136 MB | 13 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Wecref Co., Ltd.](https://appshunter.io/developer/1570555584) | [LUCCA EMMANUEL PINELI SIMOES LTDA](https://appshunter.io/developer/1884998353) |

## What reviewers say

### 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 |


### Aritmo

[App page](https://appshunter.io/ios/app/aritmo/id6760564207)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Aritmo Premium | $3.99 | per month |
| Aritmo Yearly Premium Access | $29.99 | per year |


## Frequently asked questions

### Is Chaipang Addition free?

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

### Is Aritmo free?

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

### Do Chaipang Addition or Aritmo have ads?

Aritmo shows ads; Chaipang Addition does not.

### Which is updated more often, Chaipang Addition or Aritmo?

Chaipang Addition ships an update fortnightly, and Aritmo every 2 days. Most recently, Chaipang Addition was updated on October 27, 2026 and Aritmo on October 8, 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.*