# Deux（ドゥー） vs 4cm（ヨンセンチ）

The clearest difference is update cadence: Deux（ドゥー） at every 3 months against 4cm（ヨンセンチ）'s every 38 months. Deux（ドゥー） also leads on iOS requirement (8.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Deux（ドゥー） ships an update every 3 months, 4cm（ヨンセンチ） every 38 months. The most recent releases landed on September 30, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Deux（ドゥー） | 4cm（ヨンセンチ） |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 38 months |
| Size | 10 MB | 3 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cynd Co.,Ltd.](https://appshunter.io/developer/512501162) | [shingo kamei](https://appshunter.io/developer/1256845824) |

## What reviewers say

### Deux（ドゥー）

[App page](https://appshunter.io/ios/app/deux/id1511121629)

**Features:** macOS Compatibility

**In-app purchases:** none


### 4cm（ヨンセンチ）

[App page](https://appshunter.io/ios/app/4cm/id6444125643)

**In-app purchases:** none


## Frequently asked questions

### Is Deux（ドゥー） free?

Deux（ドゥー） is free to download, with no in-app purchases.

### Is 4cm（ヨンセンチ） free?

4cm（ヨンセンチ） is free to download, with no in-app purchases.

### Do Deux（ドゥー） or 4cm（ヨンセンチ） have ads?

Neither Deux（ドゥー） nor 4cm（ヨンセンチ） shows ads.

### Which is updated more often, Deux（ドゥー） or 4cm（ヨンセンチ）?

Deux（ドゥー） ships an update every 3 months, and 4cm（ヨンセンチ） every 38 months. Most recently, Deux（ドゥー） was updated on September 30, 2026 and 4cm（ヨンセンチ） on September 29, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*