# 3D Solar System vs Armillary Sphere

The clearest difference is review sentiment: Armillary Sphere at 86% against 3D Solar System's 29%. Armillary Sphere also leads on in-app purchases (none vs 12) and ads (none vs shown). 3D Solar System's advantage is rating (4.4 vs 4.0) and update cadence (fortnightly vs every 5 months). On price and device support 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. Armillary Sphere asks for nothing beyond the download.

3D Solar System holds the better App Store score, 4.4 against 4.0. That said, the two scores are not equally well evidenced: 3D Solar System has 1.7K ratings behind it against 6, so its average is the more settled of the two. Written reviews complicate that: 29% of 3D Solar System's written reviews are positive against 86% of Armillary Sphere's, so the app with the better star average is not the one people write more warmly about.

3D Solar System ships an update fortnightly, Armillary Sphere every 5 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 3D Solar System | Armillary Sphere |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (1.7K ratings)](https://appshunter.io/ios/app/3d-solar-system-planets-view/id983877380/reviews)** | [4.0 (6 ratings)](https://appshunter.io/ios/app/armillary-sphere/id1225026601/reviews) |
| Number of ratings | **1.7K** | 6 |
| Positive reviews | 28.8% of reviews | **85.7% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 5 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 351 MB | 275 MB |
| Requires iOS | 16.0 | **9.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Education Terra](https://appshunter.io/developer/946819038) | [HKU TELI](https://appshunter.io/developer/1153931100) |

## 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 | $39.99 | 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


### Armillary Sphere

[App page](https://appshunter.io/ios/app/armillary-sphere/id1225026601)

Explore the cosmos with this 3D astronomical tool. Measure and record the positions and movements of celestial bodies, and determine sunrise/sunset times and day length. Reconstructs an ancient scientific instrument using modern technology.

**Highlights:** 3D astronomical model, Measure celestial positions, Record Sun and star movements, Determine sunrise/sunset times, Calculate day length, Adjustable Meridian, Equator, Horizon, Ecliptic, Altitude

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 3D Solar System free?

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

### Is Armillary Sphere free?

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

### Which has better reviews, 3D Solar System or Armillary Sphere?

3D Solar System is rated higher. 3D Solar System averages 4.4 out of 5 from 1.7K ratings, while Armillary Sphere averages 4.0 from 6 ratings.

### Do 3D Solar System or Armillary Sphere have ads?

3D Solar System shows ads; Armillary Sphere does not.

### Which is updated more often, 3D Solar System or Armillary Sphere?

3D Solar System ships an update fortnightly, and Armillary Sphere every 5 months. Most recently, 3D Solar System was updated on October 26, 2026 and Armillary Sphere on October 24, 2026.

---

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