# MutLab vs Re.Ra.Ku Group

The clearest difference is iOS requirement: MutLab at 13.0 against Re.Ra.Ku Group's 15.1. 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.

MutLab ships an update every 2 months, Re.Ra.Ku Group every 6 weeks. The most recent releases landed on September 21, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | MutLab | Re.Ra.Ku Group |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 25.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | — | Free |
| Size | 60 MB | 34 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mutlab](https://appshunter.io/developer/1363984051) | [株式会社EPARKリラク&エステ](https://appshunter.io/developer/1096509136) |

## What reviewers say

### MutLab

[App page](https://appshunter.io/ios/app/mutlab/id1576343740)

**Features:** macOS Compatibility

**In-app purchases:** none


### Re.Ra.Ku Group

[App page](https://appshunter.io/ios/app/reraku-group/id1604692153)

This official app allows users to easily check availability and book appointments at relaxation studios. It features a digital membership card, balance checks for payment cards, and exclusive deals and coupons for app users.

**Highlights:** Check availability and book appointments, Search and find group stores, Digital membership and payment card display, View来店スタンプ and リラクカード balance, Access app-exclusive coupons and deals, Receive campaign information via push notifications

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is MutLab free?

MutLab is free to download, with no in-app purchases.

### Is Re.Ra.Ku Group free?

Re.Ra.Ku Group is free to download, with no in-app purchases.

### Do MutLab or Re.Ra.Ku Group have ads?

Neither MutLab nor Re.Ra.Ku Group shows ads.

### Which is updated more often, MutLab or Re.Ra.Ku Group?

MutLab ships an update every 2 months, and Re.Ra.Ku Group every 6 weeks. Most recently, MutLab was updated on September 21, 2026 and Re.Ra.Ku Group on September 17, 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.*