# Online System vs Prevent

Online System and Prevent are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Online System ships an update every 3 weeks, Prevent monthly. The most recent releases landed on September 23, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Online System | Prevent |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Size | 49 MB | 123 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Nilton da Costa Teixeira Junior](https://appshunter.io/developer/1630212092) | [Voxter Brasil LTDA](https://appshunter.io/developer/1423674208) |

## What reviewers say

### Online System

[App page](https://appshunter.io/ios/app/online-system/id1630212090)

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

**In-app purchases:** none


### Prevent

[App page](https://appshunter.io/ios/app/prevent/id6472447451)

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

**In-app purchases:** none


## Frequently asked questions

### Is Online System free?

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

### Is Prevent free?

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

### Do Online System or Prevent have ads?

Neither Online System nor Prevent shows ads.

### Which is updated more often, Online System or Prevent?

Online System ships an update every 3 weeks, and Prevent monthly. Most recently, Online System was updated on September 23, 2026 and Prevent on September 25, 2026.

---

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