# Protocol Sirens and Steel vs Idle Stone Breakers

The clearest difference is in-app purchases: Protocol Sirens and Steel at none against Idle Stone Breakers's 10. Protocol Sirens and Steel also leads on ads (none vs shown) and iOS requirement (12.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. Idle Stone Breakers sells 10 one-off in-app purchases. Protocol Sirens and Steel asks for nothing beyond the download.

## The numbers

| Metric | Protocol Sirens and Steel | Idle Stone Breakers |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Size | 400 MB | 263 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Usama Javed](https://appshunter.io/developer/1839274257) | [建新 许](https://appshunter.io/developer/1896609768) |

## What reviewers say

### Protocol Sirens and Steel

[App page](https://appshunter.io/ios/app/protocol-sirens-and-steel/id6756848089)

**Features:** macOS Compatibility

**In-app purchases:** none


### Idle Stone Breakers

[App page](https://appshunter.io/ios/app/idle-stone-breakers/id6786330676)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1.8A Gems | $0.99 | one-time |
| material privileges | $4.99 | one-time |
| 9.9A Gems | $4.99 | one-time |
| 7-Day Login VIP Pack | $4.99 | one-time |
| 25.46A Gems | $9.99 | one-time |
| 30-Day Login VIP Pack | $9.99 | one-time |
| 30 days material gift package | $9.99 | one-time |
| 46.08A Gems | $19.99 | one-time |
| 123.44A Gems | $49.99 | one-time |
| 272.16A Gems | $99.99 | one-time |


## Frequently asked questions

### Is Protocol Sirens and Steel free?

Protocol Sirens and Steel is free to download, with no in-app purchases.

### Is Idle Stone Breakers free?

Idle Stone Breakers is free to download, with in-app purchases available.

### Do Protocol Sirens and Steel or Idle Stone Breakers have ads?

Idle Stone Breakers shows ads; Protocol Sirens and Steel does not.

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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.*