# Universe Size Comparison vs Planetaria

The clearest difference is rating: Planetaria at 4.2 against Universe Size Comparison's 3.2. Universe Size Comparison's advantage is review sentiment (70% vs 50%) and price ($1.99 vs $4.99). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

Universe Size Comparison costs $1.99 and Planetaria $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Planetaria holds the better App Store score, 4.2 against 3.2. Both are backed by a comparable volume of ratings — 30 and 16 respectively. Written reviews complicate that: 70% of Universe Size Comparison's written reviews are positive against 50% of Planetaria's, so the app with the better star average is not the one people write more warmly about.

Universe Size Comparison ships an update every 3 months, Planetaria every 5 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | Universe Size Comparison | Planetaria |
| --- | --- | --- |
| Price | **$1.99** | $4.99 |
| Rating | [3.2 (30 ratings)](https://appshunter.io/ios/app/universe-size-comparison/id1473946290/reviews) | **[4.2 (16 ratings)](https://appshunter.io/ios/app/planetaria-space-simulator/id1546887479/reviews)** |
| Number of ratings | **30** | 16 |
| Positive reviews | **70.0% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 5 months |
| Monetization | Paid | Paid |
| Size | 411 MB | 510 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | iPhone, iPad, Apple TV | iPhone, iPad, Vision Pro |
| Age rating | +4 | 4+ |
| Developer | [Daniele Citi](https://appshunter.io/developer/1187632258) | [Joseph Rupertus](https://appshunter.io/developer/1610637143) |

## What reviewers say

### Universe Size Comparison

[App page](https://appshunter.io/ios/app/universe-size-comparison/id1473946290)

Explore the vastness of space and understand celestial body dimensions through interactive 3D comparisons. Discover the scale of planets and stars, from our Sun to hypergiant stars, with guided tours and free comparison modes.

**Highlights:** 3D astronomical comparisons, Tour Mode with guided explanations, Free Mode for custom comparisons, Scale comparisons of planets and stars, Detailed celestial body information, Elegant user interface

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

**In-app purchases:** none


### Planetaria

[App page](https://appshunter.io/ios/app/planetaria-space-simulator/id1546887479)

Explore a dynamic 3D model of the Solar System, synchronizing with real-time data to show celestial bodies in orbit. Discover planets, dwarf planets, and moons with detailed surface models. Manipulate time to view past and future solar system configurations.

**Highlights:** Interactive 3D Solar System model, Real-time celestial body positions, Detailed 3D surface models, Explore planets, dwarf planets, and moons, Time manipulation (past/future), AR integration

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Universe Size Comparison free?

Universe Size Comparison costs $1.99, with no in-app purchases.

### Is Planetaria free?

Planetaria costs $4.99, with no in-app purchases.

### Which has better reviews, Universe Size Comparison or Planetaria?

Planetaria is rated higher. Universe Size Comparison averages 3.2 out of 5 from 30 ratings, while Planetaria averages 4.2 from 16 ratings.

### Do Universe Size Comparison or Planetaria have ads?

Neither Universe Size Comparison nor Planetaria shows ads.

### Which is updated more often, Universe Size Comparison or Planetaria?

Universe Size Comparison ships an update every 3 months, and Planetaria every 5 months. Most recently, Universe Size Comparison was updated on November 3, 2026 and Planetaria on November 3, 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.*