# Relaxation mummy　公式アプリ vs ホワイトニングRABBY

Relaxation mummy　公式アプリ and ホワイトニングRABBY 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.

Relaxation mummy　公式アプリ ships an update every 39 months, ホワイトニングRABBY every 38 months. The most recent releases landed on November 3, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Relaxation mummy　公式アプリ | ホワイトニングRABBY |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 39 months | **Every 38 months** |
| Size | 22 MB | 17 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MAYUMI UWAFUNE](https://appshunter.io/developer/1627465248) | [RIDING,K.K.](https://appshunter.io/developer/1699136869) |

## What reviewers say

### Relaxation mummy　公式アプリ

[App page](https://appshunter.io/ios/app/relaxation-mummy/id1627465246)

**In-app purchases:** none


### ホワイトニングRABBY

[App page](https://appshunter.io/ios/app/rabby/id6452982228)

**In-app purchases:** none


## Frequently asked questions

### Is Relaxation mummy　公式アプリ free?

Relaxation mummy　公式アプリ is free to download, with no in-app purchases.

### Is ホワイトニングRABBY free?

ホワイトニングRABBY is free to download, with no in-app purchases.

### Do Relaxation mummy　公式アプリ or ホワイトニングRABBY have ads?

Neither Relaxation mummy　公式アプリ nor ホワイトニングRABBY shows ads.

### Which is updated more often, Relaxation mummy　公式アプリ or ホワイトニングRABBY?

Relaxation mummy　公式アプリ ships an update every 39 months, and ホワイトニングRABBY every 38 months. Most recently, Relaxation mummy　公式アプリ was updated on November 3, 2026 and ホワイトニングRABBY on October 27, 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.*