# Cosmology vs Solar System

The clearest difference is rating: Cosmology at 4.7 against Solar System's 3.8. Cosmology also leads on update cadence (monthly vs every 107 months) and review sentiment (89% vs 67%). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Cosmology holds the better App Store score, 4.7 against 3.8. That said, the two scores are not equally well evidenced: Cosmology has 554 ratings behind it against 32, so its average is the more settled of the two. Written reviews point the same way: 89% of Cosmology's written reviews are positive against 67% of Solar System's.

Cosmology ships an update monthly, Solar System every 107 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Cosmology | Solar System |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (554 ratings)](https://appshunter.io/ios/app/cosmology/id1028872453/reviews)** | [3.8 (32 ratings)](https://appshunter.io/ios/app/solar-system-ar-view/id1335043082/reviews) |
| Number of ratings | **554** | 32 |
| Positive reviews | **88.6% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 107 months |
| Monetization | Free | Free |
| Size | 190 MB | 12 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Aaron Day](https://appshunter.io/developer/1028872452) | [Luis Carvajal Hoyos](https://appshunter.io/developer/1061577851) |

## What reviewers say

### Cosmology

[App page](https://appshunter.io/ios/app/cosmology/id1028872453)

Explore the universe with stunning high-resolution images of celestial bodies. Journey through space, visiting planets and their moons, while learning about the evolution of space, time, and matter. Ponder the profound mysteries of existence.

**Highlights:** High-resolution images of planets, nebulae, and galaxies, Interactive space travel to planets and moons, Learn about the evolution of space, time, and matter, Expert narration by Dr. Aaron Day, Exploration of existential mysteries of the universe

**In-app purchases:** none

**What reviewers like**

- 🌟 Stunning, beautiful astrophotography images
- 📚 Educational content about space and universe
- 👍 Easy to use and understand interface
- 🎥 Informative videos and interactive features
- 🗺️ Interactive map for exploring cosmic scales

**What reviewers complain about**

- 🐛 Image interference/technical glitches
- 📖 Shallow explanations for non-experts
- ⚠️ Limited educational depth compared to NASA app
- 🤔 Big Bang theory focus may conflict with religious beliefs
- ❌ Incomplete sections (Milky Way, Island Universe)

**Reported bugs**

- Image display interference/hacking concerns
- App feels incomplete in certain sections

**Requested features**

- More interactive activities and engagement features
- Text-to-speech functionality
- More detailed explanations for beginner-level users
- Additional sub-categories and content sections
- Regular updates with current astronomical images


### Solar System

[App page](https://appshunter.io/ios/app/solar-system-ar-view/id1335043082)

Explore planets, dwarf planets, and moons in your own space using augmented reality. Walk around the solar system, view celestial bodies in scale, and access detailed information about each planet and its moons.

**Highlights:** Augmented reality solar system view, Explore planets, dwarf planets, and moons, Scale mode for size and distance comparison, Detailed planet and moon information, Interactive exploration

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

**In-app purchases:** none


## Frequently asked questions

### Is Cosmology free?

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

### Is Solar System free?

Solar System is free to download, with no in-app purchases.

### Which has better reviews, Cosmology or Solar System?

Cosmology is rated higher. Cosmology averages 4.7 out of 5 from 554 ratings, while Solar System averages 3.8 from 32 ratings.

### Do Cosmology or Solar System have ads?

Neither Cosmology nor Solar System shows ads.

### Which is updated more often, Cosmology or Solar System?

Cosmology ships an update monthly, and Solar System every 107 months. Most recently, Cosmology was updated on November 1, 2026 and Solar System on November 2, 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.*