# Univerzoom 2D Size Comparison vs 3D Star Map

The clearest difference is in-app purchases: 3D Star Map at none against Univerzoom 2D Size Comparison's 3. Univerzoom 2D Size Comparison's advantage is ratings volume (77 vs 10). On price, rating, review sentiment and update cadence there is nothing between them.

Both are free to download. Univerzoom 2D Size Comparison sells 3 one-off in-app purchases. 3D Star Map asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.6 for Univerzoom 2D Size Comparison against 4.5 for 3D Star Map. That said, the two scores are not equally well evidenced: Univerzoom 2D Size Comparison has 77 ratings behind it against 10, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

Univerzoom 2D Size Comparison ships an update weekly, 3D Star Map every 2 weeks. The most recent releases landed on November 7, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Univerzoom 2D Size Comparison | 3D Star Map |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (77 ratings)](https://appshunter.io/ios/app/univerzoom-2d-size-comparison/id1598332779/reviews)** | [4.5 (10 ratings)](https://appshunter.io/ios/app/3d-star-map/id6758356924/reviews) |
| Number of ratings | **77** | 10 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 254 MB | 100 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Linda Schnetzinger](https://appshunter.io/developer/1479825448) | [Alexander Winn](https://appshunter.io/developer/652547902) |

## What reviewers say

### Univerzoom 2D Size Comparison

[App page](https://appshunter.io/ios/app/univerzoom-2d-size-comparison/id1598332779)

Explore the relative sizes of everyday objects with minimalist visual comparisons. Create and share custom comparisons of vehicles, animals, landmarks, and more to understand their true dimensions. Perfect for students, educators, and anyone curious about scale.

**Highlights:** Create custom size comparisons, Explore terrestrial object categories, Visualize dimensions in orthogonal perspective, Customize comparisons with an easy interface, Save and share visual references

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to Complete Collection | $1.99 | one-time |
| Premium Unlock | $1.99 | one-time |
| Complete Collection | $3.99 | one-time |


### 3D Star Map

[App page](https://appshunter.io/ios/app/3d-star-map/id6758356924)

Explore over 700 stars in our local star cluster in a 3D space simulation. Zoom, rotate, and learn about neighboring star systems with detailed information available on tap. Perfect for research or satisfying cosmic curiosity.

**Highlights:** 3D space exploration, Over 700 local stars, Detailed star information, Zoom, rotate, and move, Relaxing animations, Educational content

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

**In-app purchases:** none


## Frequently asked questions

### Is Univerzoom 2D Size Comparison free?

Univerzoom 2D Size Comparison is free to download, with in-app purchases available.

### Is 3D Star Map free?

3D Star Map is free to download, with no in-app purchases.

### Which has better reviews, Univerzoom 2D Size Comparison or 3D Star Map?

Univerzoom 2D Size Comparison is rated higher. Univerzoom 2D Size Comparison averages 4.6 out of 5 from 77 ratings, while 3D Star Map averages 4.5 from 10 ratings.

### Do Univerzoom 2D Size Comparison or 3D Star Map have ads?

Neither Univerzoom 2D Size Comparison nor 3D Star Map shows ads.

### Which is updated more often, Univerzoom 2D Size Comparison or 3D Star Map?

Univerzoom 2D Size Comparison ships an update weekly, and 3D Star Map every 2 weeks. Most recently, Univerzoom 2D Size Comparison was updated on November 7, 2026 and 3D Star Map on November 5, 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.*