# Protocol 4 vs Code Breaker Puzzle

The clearest difference is in-app purchases: Code Breaker Puzzle at none against Protocol 4's 7. Code Breaker Puzzle also leads on ads (none vs shown) and iOS requirement (15.1 vs 17.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Protocol 4 sells 7 one-off in-app purchases. Code Breaker Puzzle asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on September 6, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Protocol 4 | Code Breaker Puzzle |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | Every 4 months |
| Size | 12 MB | 25 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [HAKAN OZGER](https://appshunter.io/developer/1855495033) | [秀杰 黄](https://appshunter.io/developer/1796123317) |

## What reviewers say

### Protocol 4

[App page](https://appshunter.io/ios/app/protocol-4-code-breaker-pvp/id6755742805)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pocket Change | $0.99 | one-time |
| Starter Kit | $1.99 | one-time |
| Agent License | $2.99 | one-time |
| Hacker's Stash | $4.99 | one-time |
| Pro Kit | $4.99 | one-time |
| Trust Fund | $9.99 | one-time |
| Master Kit | $9.99 | one-time |


### Code Breaker Puzzle

[App page](https://appshunter.io/ios/app/code-breaker-puzzle/id6758901654)

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

**In-app purchases:** none


## Frequently asked questions

### Is Protocol 4 free?

Protocol 4 is free to download, with in-app purchases available.

### Is Code Breaker Puzzle free?

Code Breaker Puzzle is free to download, with no in-app purchases.

### Do Protocol 4 or Code Breaker Puzzle have ads?

Protocol 4 shows ads; Code Breaker Puzzle does not.

### Which is updated more often, Protocol 4 or Code Breaker Puzzle?

Protocol 4 ships an update every 4 months, and Code Breaker Puzzle every 4 months. Most recently, Protocol 4 was updated on September 6, 2026 and Code Breaker Puzzle on September 21, 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.*