# 3D Solar System vs Space Knowledge Quiz

3D Solar System and Space Knowledge Quiz both sit at 4.4 stars, but that hides the real split: 67% of Space Knowledge Quiz's written reviews are positive against 29% of 3D Solar System's. 3D Solar System's advantage is update cadence (fortnightly vs every 4 months) and ratings volume (1.7K vs 11). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. 3D Solar System sells 12 in-app purchases, starting at $7.99 per 7 days and Space Knowledge Quiz sells 7 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Space Knowledge Quiz holds the better App Store score, 4.6 against 4.4. That said, the two scores are not equally well evidenced: 3D Solar System has 1.7K ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 29% of 3D Solar System's written reviews are positive against 67% of Space Knowledge Quiz's.

3D Solar System ships an update fortnightly, Space Knowledge Quiz every 4 months. The most recent releases landed on September 22, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | 3D Solar System | Space Knowledge Quiz |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (1.7K ratings)](https://appshunter.io/ios/app/3d-solar-system-planets-view/id983877380/reviews) | **[4.6 (11 ratings)](https://appshunter.io/ios/app/space-knowledge-quiz/id1170803086/reviews)** |
| Number of ratings | **1.7K** | 11 |
| Positive reviews | 28.6% of reviews | **66.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Fortnightly** | Every 4 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 347 MB | 127 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Education Terra](https://appshunter.io/developer/946819038) | [Asad Shoaib](https://appshunter.io/developer/1142302870) |

## What reviewers say

### 3D Solar System

[App page](https://appshunter.io/ios/app/3d-solar-system-planets-view/id983877380)

Explore the solar system in 3D and augmented reality. Learn about planets, moons, stars, and constellations through interactive models, scientific facts, and engaging quizzes. Create your own planets with AI.

**Highlights:** 3D & AR Solar System models, Scientific facts about celestial bodies, Interactive star map, Engaging educational tasks and quizzes, AI-powered planet creation

**Features:** macOS Compatibility

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Week Subscription | $7.99 | per 7 days |
| 1 Month PRO | $9.99 | per month |
| 1 month Sale | $10.99 | per month |
| 12 months sale | $14.99 | per year |
| 6 months | $19.99 | per 6 months |
| Astronomy guide - Sky atlas | $19.99 | per month |
| 12 months | $29.99 | per year |
| Astronomy guide - Sky atlas | $29.99 | per 3 months |
| 2 Month Subscription | $29.99 | per 2 months |
| 2 Months Subscription | $39.99 | per 2 months |
| Disable Ads Sale | $9.99 | one-time |
| Disable Ads | $19.99 | one-time |

**What reviewers like**

- 🌟 Informative and educational
- 🔍 Detailed solar system information
- 🎨 Cool visuals and graphics

**What reviewers complain about**

- 💰 Expensive subscription model
- 🔒 Difficult to cancel subscription
- 🤔 Misleading 'free' claims
- 🐛 Bugs and glitches
- 🤯 Confusing user interface

**Reported bugs**

- Planets displayed incorrectly
- Subscription charges without consent
- Inability to cancel subscription

**Requested features**

- More free content and features
- Realistic planet models and animations
- Expanded content beyond the solar system
- Improved accessibility and usability


### Space Knowledge Quiz

[App page](https://appshunter.io/ios/app/space-knowledge-quiz/id1170803086)

Test your knowledge of planets, galaxies, and space exploration with thousands of multiple-choice questions. Earn badges, track progress, and compete with friends. Ideal for students and trivia enthusiasts curious about the cosmos.

**Highlights:** Thousands of astronomy questions, Multiple-choice format, Progress tracking and statistics, Multiplayer mode, Timed tests for exam prep, Regular updates with new content

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro - No Ads & Unlock Topics | $1.99 | per 7 days |
| Pro - No Ads & Unlock Topics | $5.99 | per month |
| Pro - No Ads & Unlock Topics | $19.99 | per year |
| Half Eliminator | $0.99 | one-time |
| Reset Timer | $0.99 | one-time |
| Unlock Topics | $0.99 | one-time |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is 3D Solar System free?

3D Solar System is free to download, with in-app purchases available.

### Is Space Knowledge Quiz free?

Space Knowledge Quiz is free to download, with in-app purchases available.

### Which has better reviews, 3D Solar System or Space Knowledge Quiz?

Space Knowledge Quiz is rated higher. 3D Solar System averages 4.4 out of 5 from 1.7K ratings, while Space Knowledge Quiz averages 4.6 from 11 ratings.

### Do 3D Solar System or Space Knowledge Quiz have ads?

Both 3D Solar System and Space Knowledge Quiz show ads.

### Which is updated more often, 3D Solar System or Space Knowledge Quiz?

3D Solar System ships an update fortnightly, and Space Knowledge Quiz every 4 months. Most recently, 3D Solar System was updated on September 22, 2026 and Space Knowledge Quiz on September 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*