# リオグループ vs BACKDOOR会員アプリ

The clearest difference is iOS requirement: リオグループ at 12.0 against BACKDOOR会員アプリ'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.

リオグループ ships an update every 2 months, BACKDOOR会員アプリ monthly. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | リオグループ | BACKDOOR会員アプリ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/backdoor/id6448009971/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | — | Free |
| Size | 52 MB | 35 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [SECOND ASSOCIATES, K.K.](https://appshunter.io/developer/1853492644) | [株式会社ROUNDERS](https://appshunter.io/developer/1683263820) |

## What reviewers say

### リオグループ

[App page](https://appshunter.io/ios/app/id1484434042)

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

**In-app purchases:** none


### BACKDOOR会員アプリ

[App page](https://appshunter.io/ios/app/backdoor/id6448009971)

This is an exclusive members-only application for Amusement Casino BACKDOOR. Access special features and information as a valued member.

**Highlights:** Exclusive member access, Information for Amusement Casino BACKDOOR, Members-only features

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

**In-app purchases:** none


## Frequently asked questions

### Is リオグループ free?

リオグループ is free to download, with no in-app purchases.

### Is BACKDOOR会員アプリ free?

BACKDOOR会員アプリ is free to download, with no in-app purchases.

### Do リオグループ or BACKDOOR会員アプリ have ads?

Neither リオグループ nor BACKDOOR会員アプリ shows ads.

### Which is updated more often, リオグループ or BACKDOOR会員アプリ?

リオグループ ships an update every 2 months, and BACKDOOR会員アプリ monthly. Most recently, リオグループ was updated on October 26, 2026 and BACKDOOR会員アプリ 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.*