# signal13 vs SHADOW PROTOCOL

The clearest difference is in-app purchases: SHADOW PROTOCOL at none against signal13's 1. SHADOW PROTOCOL also leads on ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. signal13 sells 1 one-off in-app purchase. SHADOW PROTOCOL asks for nothing beyond the download.

## The numbers

| Metric | signal13 | SHADOW PROTOCOL |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/signal13-horror-game/id6783542336/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 days | — |
| Monetization | Free with in-app purchases | — |
| Size | 155 MB | 367 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [space ideas llc](https://appshunter.io/developer/1704095505) | [云鹏 黄](https://appshunter.io/developer/1894905059) |

## What reviewers say

### signal13

[App page](https://appshunter.io/ios/app/signal13-horror-game/id6783542336)

Experience a psychological horror game through a realistic smartphone interface. Investigate surveillance, calls, and corrupted files as reality unravels. Uncover the truth or become part of the signal.

**Highlights:** Realistic smartphone interface, Investigate surveillance cameras, Analyze hidden archives, Mysterious phone calls and radio transmissions, Corrupted file analysis, Psychological horror experience

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### SHADOW PROTOCOL

[App page](https://appshunter.io/ios/app/shadow-protocol-zero/id6794192148)

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

**In-app purchases:** none


## Frequently asked questions

### Is signal13 free?

signal13 is free to download, with in-app purchases available.

### Is SHADOW PROTOCOL free?

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

### Do signal13 or SHADOW PROTOCOL have ads?

signal13 shows ads; SHADOW PROTOCOL 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.*