# Hollow Vigil vs SHADOW PROTOCOL

The clearest difference is price: SHADOW PROTOCOL at Free against Hollow Vigil's $0.49. SHADOW PROTOCOL also leads on device support (3 vs 1) and iOS requirement (13.0 vs 18.0). On ads and in-app purchases there is nothing between them.

SHADOW PROTOCOL is free to download; Hollow Vigil costs $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Hollow Vigil | SHADOW PROTOCOL |
| --- | --- | --- |
| Price | $0.49 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 days | — |
| Size | 51 MB | 367 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Alperen Unal](https://appshunter.io/developer/1499955243) | [云鹏 黄](https://appshunter.io/developer/1894905059) |

## What reviewers say

### Hollow Vigil

[App page](https://appshunter.io/ios/app/hollow-vigil-chat-horror/id6762568440)

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

**In-app purchases:** none


### 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 Hollow Vigil free?

Hollow Vigil costs $0.49, with no in-app purchases.

### Is SHADOW PROTOCOL free?

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

### Do Hollow Vigil or SHADOW PROTOCOL have ads?

Neither Hollow Vigil nor SHADOW PROTOCOL shows ads.

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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.*