# BACKDOOR会員アプリ vs PairIndex

The clearest difference is ads: BACKDOOR会員アプリ at none against PairIndex's shown. PairIndex's advantage is update cadence (every 4 days vs monthly). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

BACKDOOR会員アプリ ships an update monthly, PairIndex every 4 days. The most recent releases landed on October 11, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | BACKDOOR会員アプリ | PairIndex |
| --- | --- | --- |
| 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** | Yes |
| Update frequency | Monthly | **Every 4 days** |
| Monetization | Free | — |
| Size | 41 MB | 22 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ROUNDERS, K.K.](https://appshunter.io/developer/1683263820) | [Hiroomi Kubo](https://appshunter.io/developer/1819954362) |

## What reviewers say

### 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


### PairIndex

[App page](https://appshunter.io/ios/app/pairindex/id6811271011)

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

**In-app purchases:** none


## Frequently asked questions

### Is BACKDOOR会員アプリ free?

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

### Is PairIndex free?

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

### Do BACKDOOR会員アプリ or PairIndex have ads?

PairIndex shows ads; BACKDOOR会員アプリ does not.

### Which is updated more often, BACKDOOR会員アプリ or PairIndex?

BACKDOOR会員アプリ ships an update monthly, and PairIndex every 4 days. Most recently, BACKDOOR会員アプリ was updated on October 11, 2026 and PairIndex on September 28, 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.*