# Chainon. vs 4cm（ヨンセンチ）

Chainon. and 4cm（ヨンセンチ） are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Chainon. ships an update every 41 months, 4cm（ヨンセンチ） every 38 months. The most recent releases landed on September 26, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Chainon. | 4cm（ヨンセンチ） |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 41 months | **Every 38 months** |
| Size | 3 MB | 3 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kazuki Iwashita](https://appshunter.io/developer/1572807913) | [shingo kamei](https://appshunter.io/developer/1256845824) |

## What reviewers say

### Chainon.

[App page](https://appshunter.io/ios/app/chainon/id1572807911)

**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 Chainon. free?

Chainon. 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 Chainon. or 4cm（ヨンセンチ） have ads?

Neither Chainon. nor 4cm（ヨンセンチ） shows ads.

### Which is updated more often, Chainon. or 4cm（ヨンセンチ）?

Chainon. ships an update every 41 months, and 4cm（ヨンセンチ） every 38 months. Most recently, Chainon. was updated on September 26, 2026 and 4cm（ヨンセンチ） on September 10, 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.*