# Idle Prison Manager 3D vs Gadget Universe

The clearest difference is rating: Gadget Universe at 3.8 against Idle Prison Manager 3D's 1.6. Idle Prison Manager 3D's advantage is update cadence (every 9 days vs every 3 weeks) and ratings volume (50 vs 9). On price, review sentiment, 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.

Gadget Universe holds the better App Store score, 3.8 against 1.6. That said, the two scores are not equally well evidenced: Idle Prison Manager 3D has 50 ratings behind it against 9, so its average is the more settled of the two. Written reviews split almost evenly too, at 0% and 0% positive.

Idle Prison Manager 3D ships an update every 9 days, Gadget Universe every 3 weeks. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Idle Prison Manager 3D | Gadget Universe |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.6 (50 ratings)](https://appshunter.io/ios/app/idle-prison-manager-3d/id1624688701/reviews) | **[3.8 (9 ratings)](https://appshunter.io/ios/app/gadget-universe/id6473012015/reviews)** |
| Number of ratings | **50** | 9 |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Every 9 days** | Every 3 weeks |
| Monetization | Ad-supported | Ad-supported |
| Size | 102 MB | 173 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Brew Games](https://appshunter.io/developer/1564476450) | [Lexcorp Technologies LLP](https://appshunter.io/developer/1356492704) |

## What reviewers say

### Idle Prison Manager 3D

[App page](https://appshunter.io/ios/app/idle-prison-manager-3d/id1624688701)

Build and manage your own prison empire. Hire inmates for jobs, expand your facilities, and strive to become the ultimate prison tycoon. This simulation game challenges you to optimize operations and manage your growing correctional facility.

**Highlights:** Build the best prison, Catch criminals, Assign jobs to inmates, Become prison manager, Prison tycoon simulation

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

**In-app purchases:** none


### Gadget Universe

[App page](https://appshunter.io/ios/app/gadget-universe/id6473012015)

Become a tech mogul by making strategic decisions, designing your store, and attracting customers with the latest electronics. Upgrade and expand your business to dominate the market in this immersive simulation game.

**Highlights:** Strategic decision-making, Store layout design, Customer attraction, Electronics sales, Business expansion, Market domination

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Idle Prison Manager 3D free?

Idle Prison Manager 3D is free to download, with no in-app purchases.

### Is Gadget Universe free?

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

### Which has better reviews, Idle Prison Manager 3D or Gadget Universe?

Gadget Universe is rated higher. Idle Prison Manager 3D averages 1.6 out of 5 from 50 ratings, while Gadget Universe averages 3.8 from 9 ratings.

### Do Idle Prison Manager 3D or Gadget Universe have ads?

Both Idle Prison Manager 3D and Gadget Universe show ads.

### Which is updated more often, Idle Prison Manager 3D or Gadget Universe?

Idle Prison Manager 3D ships an update every 9 days, and Gadget Universe every 3 weeks. Most recently, Idle Prison Manager 3D was updated on November 3, 2026 and Gadget Universe on November 4, 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.*