# 髪 Dr.レルナ　公式アプリ vs 4cm（ヨンセンチ）

髪 Dr.レルナ　公式アプリ 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.

髪 Dr.レルナ　公式アプリ ships an update every 41 months, 4cm（ヨンセンチ） every 38 months. Both last shipped on October 14, 2026.

## The numbers

| Metric | 髪 Dr.レルナ　公式アプリ | 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 | 5 MB | 3 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [LIFE SUPPORT CO.,LTD.](https://appshunter.io/developer/1634722952) | [shingo kamei](https://appshunter.io/developer/1256845824) |

## What reviewers say

### 髪 Dr.レルナ　公式アプリ

[App page](https://appshunter.io/ios/app/dr/id1660211193)

**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 髪 Dr.レルナ　公式アプリ free?

髪 Dr.レルナ　公式アプリ 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 髪 Dr.レルナ　公式アプリ or 4cm（ヨンセンチ） have ads?

Neither 髪 Dr.レルナ　公式アプリ nor 4cm（ヨンセンチ） shows ads.

### Which is updated more often, 髪 Dr.レルナ　公式アプリ or 4cm（ヨンセンチ）?

髪 Dr.レルナ　公式アプリ ships an update every 41 months, and 4cm（ヨンセンチ） every 38 months. Most recently, 髪 Dr.レルナ　公式アプリ was updated on October 14, 2026 and 4cm（ヨンセンチ） on October 14, 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.*