# Under Construction Ext vs Rollblox

The clearest difference is in-app purchases: Under Construction Ext at none against Rollblox's 1. Under Construction Ext also leads on iOS requirement (12.0 vs 15.0). Rollblox's advantage is update cadence (weekly vs every 10 months). On price, ads and device support there is nothing between them.

Both are free to download. Rollblox sells 1 one-off in-app purchase. Under Construction Ext asks for nothing beyond the download.

Under Construction Ext ships an update every 10 months, Rollblox weekly. The most recent releases landed on September 18, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Under Construction Ext | Rollblox |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Weekly** |
| Size | 29 MB | 169 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ryo itou](https://appshunter.io/developer/1435019729) | [Knifecake Studios](https://appshunter.io/developer/1896746090) |

## What reviewers say

### Under Construction Ext

[App page](https://appshunter.io/ios/app/under-construction-ext/id1461739765)

**Features:** macOS Compatibility

**In-app purchases:** none


### Rollblox

[App page](https://appshunter.io/ios/app/rollblox-3d-block-puzzle/id6770478356)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Game Unlock | $4.99 | one-time |


## Frequently asked questions

### Is Under Construction Ext free?

Under Construction Ext is free to download, with no in-app purchases.

### Is Rollblox free?

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

### Do Under Construction Ext or Rollblox have ads?

Neither Under Construction Ext nor Rollblox shows ads.

### Which is updated more often, Under Construction Ext or Rollblox?

Under Construction Ext ships an update every 10 months, and Rollblox weekly. Most recently, Under Construction Ext was updated on September 18, 2026 and Rollblox on September 12, 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.*