# BUNKER PROTOCOL vs 脱出ゲーム 静かな書斎

The clearest difference is monetization model: 脱出ゲーム 静かな書斎 at ad-supported against BUNKER PROTOCOL's free with in-app purchases. On price, review sentiment, update cadence and ads there is nothing between them.

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

BUNKER PROTOCOL ships an update weekly, 脱出ゲーム 静かな書斎 every 9 days. The most recent releases landed on November 10, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | BUNKER PROTOCOL | 脱出ゲーム 静かな書斎 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Weekly** | Every 9 days |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 114 MB | 25 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sink Capital, Inc.](https://appshunter.io/developer/1505916963) | [iida atsushi](https://appshunter.io/developer/1872403865) |

## What reviewers say

### BUNKER PROTOCOL

[App page](https://appshunter.io/ios/app/bunker-protocol-black-site/id6785037330)

Explore a deserted military black site and solve intricate puzzles to escape. This 3D escape room experience requires observation and item combination to progress through chained challenges. A built-in hint system guides you without spoiling the fun.

**Highlights:** Immersive 3D environment exploration, Chained, multi-stage puzzles, Observation-based clue finding, Collect and combine items, Guided puzzle progression, Built-in hint system, Multi-language support

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

**In-app purchases:** none


### 脱出ゲーム 静かな書斎

[App page](https://appshunter.io/ios/app/id6821877706)

Explore a peaceful study and an astronomical observatory to uncover hidden mysteries. Inspect objects, collect items, and solve puzzles using clues to escape. The game offers a relaxed pace with automatic saving and optional hints.

**Highlights:** 3D escape game environment, Inspect objects and collect items, Solve puzzles with symbols and numbers, Automatic progress saving, Optional hints and answers, Dual language support (Japanese/English)

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

**In-app purchases:** none


## Frequently asked questions

### Is BUNKER PROTOCOL free?

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

### Is 脱出ゲーム 静かな書斎 free?

脱出ゲーム 静かな書斎 is free to download, with no in-app purchases.

### Do BUNKER PROTOCOL or 脱出ゲーム 静かな書斎 have ads?

Both BUNKER PROTOCOL and 脱出ゲーム 静かな書斎 show ads.

### Which is updated more often, BUNKER PROTOCOL or 脱出ゲーム 静かな書斎?

BUNKER PROTOCOL ships an update weekly, and 脱出ゲーム 静かな書斎 every 9 days. Most recently, BUNKER PROTOCOL was updated on November 10, 2026 and 脱出ゲーム 静かな書斎 on October 26, 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.*