# CLAVIS vs 4cm（ヨンセンチ）

The clearest difference is iOS requirement: CLAVIS at 8.0 against 4cm（ヨンセンチ）'s 13.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

CLAVIS ships an update every 22 months, 4cm（ヨンセンチ） every 38 months. The most recent releases landed on September 10, 2026 and June 11, 2026 respectively.

## The numbers

| Metric | CLAVIS | 4cm（ヨンセンチ） |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 22 months** | Every 38 months |
| Size | 3 MB | 3 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Naoya Takahashi](https://appshunter.io/developer/1301211980) | [shingo kamei](https://appshunter.io/developer/1256845824) |

## What reviewers say

### CLAVIS

[App page](https://appshunter.io/ios/app/clavis/id1508467576)

**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 CLAVIS free?

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

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

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

CLAVIS ships an update every 22 months, and 4cm（ヨンセンチ） every 38 months. Most recently, CLAVIS was updated on September 10, 2026 and 4cm（ヨンセンチ） on June 11, 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.*