# BACKDOOR会員アプリ vs 音楽家のための英単語

BACKDOOR会員アプリ and 音楽家のための英単語 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.

BACKDOOR会員アプリ ships an update monthly, 音楽家のための英単語 every 2 months. The most recent releases landed on October 11, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | BACKDOOR会員アプリ | 音楽家のための英単語 |
| --- | --- | --- |
| 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 | **Monthly** | Every 2 months |
| Monetization | Free | — |
| Size | 41 MB | 20 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ROUNDERS, K.K.](https://appshunter.io/developer/1683263820) | [Hiroaki Toya](https://appshunter.io/developer/1515661642) |

## 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


### 音楽家のための英単語

[App page](https://appshunter.io/ios/app/id6474048408)

**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 音楽家のための英単語 free?

音楽家のための英単語 is free to download, with no in-app purchases.

### Do BACKDOOR会員アプリ or 音楽家のための英単語 have ads?

Neither BACKDOOR会員アプリ nor 音楽家のための英単語 shows ads.

### Which is updated more often, BACKDOOR会員アプリ or 音楽家のための英単語?

BACKDOOR会員アプリ ships an update monthly, and 音楽家のための英単語 every 2 months. Most recently, BACKDOOR会員アプリ was updated on October 11, 2026 and 音楽家のための英単語 on October 7, 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.*