# 将棋世界（日本将棋連盟発行） vs BACKDOOR会員アプリ

The clearest difference is in-app purchases: BACKDOOR会員アプリ at none against 将棋世界（日本将棋連盟発行）'s 3. BACKDOOR会員アプリ also leads on update cadence (monthly vs every 3 months). 将棋世界（日本将棋連盟発行）'s advantage is iOS requirement (6.1 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. 将棋世界（日本将棋連盟発行） sells 3 in-app purchases, starting at $5.99 per month. BACKDOOR会員アプリ asks for nothing beyond the download.

将棋世界（日本将棋連盟発行） ships an update every 3 months, BACKDOOR会員アプリ monthly. The most recent releases landed on October 6, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | 将棋世界（日本将棋連盟発行） | 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 | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | — | Free |
| Size | 23 MB | 41 MB |
| Requires iOS | **6.1** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DENTSU INC.](https://appshunter.io/developer/326362308) | [ROUNDERS, K.K.](https://appshunter.io/developer/1683263820) |

## What reviewers say

### 将棋世界（日本将棋連盟発行）

[App page](https://appshunter.io/ios/app/id853502085)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 将棋世界 | $5.99 | per month |
| 将棋世界 | $36.99 | per 6 months |
| 将棋世界 | $59.99 | per year |


### 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 将棋世界（日本将棋連盟発行） free?

将棋世界（日本将棋連盟発行） is free to download, with in-app purchases available.

### Is BACKDOOR会員アプリ free?

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

### Do 将棋世界（日本将棋連盟発行） or BACKDOOR会員アプリ have ads?

Neither 将棋世界（日本将棋連盟発行） nor BACKDOOR会員アプリ shows ads.

### Which is updated more often, 将棋世界（日本将棋連盟発行） or BACKDOOR会員アプリ?

将棋世界（日本将棋連盟発行） ships an update every 3 months, and BACKDOOR会員アプリ monthly. Most recently, 将棋世界（日本将棋連盟発行） was updated on October 6, 2026 and BACKDOOR会員アプリ on October 11, 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.*