# Prevent vs Voltaire Plus

The clearest difference is device support: Prevent at 3 against Voltaire Plus's 1. Prevent also leads on iOS requirement (8.0 vs 18.0). On price, ads and in-app purchases there is nothing between them.

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

## The numbers

| Metric | Prevent | Voltaire Plus |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Monthly |
| Size | 66 MB | 86 MB |
| Requires iOS | **8.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 17+ |
| Developer | [The University of Manchester](https://appshunter.io/developer/418394509) | [Voltaire](https://appshunter.io/developer/1524925023) |

## What reviewers say

### Prevent

[App page](https://appshunter.io/ios/app/prevent/id1601432200)

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

**In-app purchases:** none


### Voltaire Plus

[App page](https://appshunter.io/ios/app/voltaire-plus/id6450784238)

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

**In-app purchases:** none


## Frequently asked questions

### Is Prevent free?

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

### Is Voltaire Plus free?

Voltaire Plus is free to download, with no in-app purchases.

### Do Prevent or Voltaire Plus have ads?

Neither Prevent nor Voltaire Plus shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*