# Curved Spaces vs Stars Units Sizes Objects

The clearest difference is rating: Curved Spaces at 4.8 against Stars Units Sizes Objects's 4.2. Curved Spaces also leads on ads (none vs shown) and monetization model (free vs ad-supported). Stars Units Sizes Objects's advantage is iOS requirement (11.0 vs 14.0). On price, update cadence, in-app purchases and device support there is nothing between them.

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

Curved Spaces holds the better App Store score, 4.8 against 4.2. That said, the two scores are not equally well evidenced: Curved Spaces has 25 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 92% of Curved Spaces's written reviews are positive against 80% of Stars Units Sizes Objects's.

Curved Spaces ships an update every 5 months, Stars Units Sizes Objects every 4 months. The most recent releases landed on October 3, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Curved Spaces | Stars Units Sizes Objects |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (25 ratings)](https://appshunter.io/ios/app/curved-spaces/id1417178571/reviews)** | [4.2 (5 ratings)](https://appshunter.io/ios/app/stars-units-sizes-objects/id1576148571/reviews) |
| Number of ratings | **25** | 5 |
| Positive reviews | **92.3% of reviews** | 80.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 4 months** |
| Monetization | **Free** | Ad-supported |
| Size | 11 MB | 124 MB |
| Requires iOS | 14.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jeff Weeks](https://appshunter.io/developer/326104308) | [Mudarmeen Munlin](https://appshunter.io/developer/1348165664) |

## What reviewers say

### Curved Spaces

[App page](https://appshunter.io/ios/app/curved-spaces/id1417178571)

Explore multi-connected universes with this flight simulator. Visualize how light wraps around complex spaces, creating repeating crystalline patterns. It's a tool for students and researchers in topology and cosmology.

**Highlights:** Multi-connected universe simulation, Visualizes light wrapping, Crystalline pattern display, Topology research tool, Cosmology research tool, Educational for 3-manifolds

**In-app purchases:** none


### Stars Units Sizes Objects

[App page](https://appshunter.io/ios/app/stars-units-sizes-objects/id1576148571)

Explore the vastness of the universe, from the smallest particles to the largest cosmic structures. Compare object sizes, view detailed images, and perform unit conversions across a wide range of astronomical scales. Learn about stars, galaxies, and the incredible distances between them.

**Highlights:** Compare object sizes, View object images, Pinch/Zoom and Pan images, Unit conversion for distances, Explore scales from Planck length to observable universe, Learn about stars and galaxies

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Curved Spaces free?

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

### Is Stars Units Sizes Objects free?

Stars Units Sizes Objects is free to download, with no in-app purchases.

### Which has better reviews, Curved Spaces or Stars Units Sizes Objects?

Curved Spaces is rated higher. Curved Spaces averages 4.8 out of 5 from 25 ratings, while Stars Units Sizes Objects averages 4.2 from 5 ratings.

### Do Curved Spaces or Stars Units Sizes Objects have ads?

Stars Units Sizes Objects shows ads; Curved Spaces does not.

### Which is updated more often, Curved Spaces or Stars Units Sizes Objects?

Curved Spaces ships an update every 5 months, and Stars Units Sizes Objects every 4 months. Most recently, Curved Spaces was updated on October 3, 2026 and Stars Units Sizes Objects on September 22, 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.*