# Box Builder Online vs Contagious Mayhem

The clearest difference is in-app purchases: Contagious Mayhem at none against Box Builder Online's 2. Contagious Mayhem also leads on ads (none vs shown) and update cadence (every 2 months vs every 9 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Box Builder Online sells 2 one-off in-app purchases. Contagious Mayhem asks for nothing beyond the download.

Box Builder Online ships an update every 9 months, Contagious Mayhem every 2 months. The most recent releases landed on October 20, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Box Builder Online | Contagious Mayhem |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 9 months | **Every 2 months** |
| Size | 280 MB | 147 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Tran Viet](https://appshunter.io/developer/1498967947) | [Satakunnan Ammattikorkeakoulu Oy](https://appshunter.io/developer/1607646667) |

## What reviewers say

### Box Builder Online

[App page](https://appshunter.io/ios/app/box-builder-online/id6448870204)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |
| Unlock All | $2.99 | one-time |


### Contagious Mayhem

[App page](https://appshunter.io/ios/app/contagious-mayhem/id6472609324)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Box Builder Online free?

Box Builder Online is free to download, with in-app purchases available.

### Is Contagious Mayhem free?

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

### Do Box Builder Online or Contagious Mayhem have ads?

Box Builder Online shows ads; Contagious Mayhem does not.

### Which is updated more often, Box Builder Online or Contagious Mayhem?

Box Builder Online ships an update every 9 months, and Contagious Mayhem every 2 months. Most recently, Box Builder Online was updated on October 20, 2026 and Contagious Mayhem on October 18, 2026.

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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.*