# Solar System Scope vs TestByState

The clearest difference is rating: TestByState at 5.0 against Solar System Scope's 4.4. TestByState also leads on update cadence (weekly vs every 4 months). Solar System Scope's advantage is ratings volume (882 vs 1) and iOS requirement (13.0 vs 16.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Solar System Scope sells 1 one-off in-app purchase and TestByState sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

TestByState holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Solar System Scope has 882 ratings behind it against 1, so its average is the more settled of the two.

Solar System Scope ships an update every 4 months, TestByState weekly. The most recent releases landed on October 12, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Solar System Scope | TestByState |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (882 ratings)](https://appshunter.io/ios/app/solar-system-scope/id863969175/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/testbystate-state-test-prep/id6801668817/reviews)** |
| Number of ratings | **882** | 1 |
| Positive reviews | 76.5% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 154 MB | 14 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [INOVE, s.r.o.](https://appshunter.io/developer/863969178) | [Mahdi Alhady](https://appshunter.io/developer/1792658105) |

## What reviewers say

### Solar System Scope

[App page](https://appshunter.io/ios/app/solar-system-scope/id863969175)

Explore and discover the solar system and outer space with realistic 3D visualizations and detailed celestial simulations. This app offers an educational and engaging experience for all ages, featuring a comprehensive encyclopedia and a night sky observatory.

**Highlights:** 3D Encyclopedia of celestial bodies, Realistic 3D visualizations, Night sky observatory with time simulation, Accurate orbital parameter calculations, High-quality planetary and moon maps, Multilingual support

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HQ Textures / No Ads | $5.99 | one-time |

**What reviewers like**

- 🚀 Amazing app
- 👍 Great for learning about space
- 🌟 Beautifully created
- 🔭 Realistic and detailed
- 🎓 Excellent for education

**What reviewers complain about**

- 🐛 Crashes frequently
- 🔀 Orientation issues
- 🔒 Upgrade required for full functionality
- 🕰️ Difficulty pinpointing specific dates

**Reported bugs**

- Crashes when dragging Jupiter
- Upside-down orientation on tablets
- Unable to restore purchases
- Freezes and crashes on launch

**Requested features**

- Add more celestial bodies (Messier objects, Planet 9/10, black holes, etc.)
- Enable exploration of other galaxies and deep space objects
- Improve telescope/zoom functionality
- Add more moons and irregular satellites
- Implement continental drift and solar system evolution


### TestByState

[App page](https://appshunter.io/ios/app/testbystate-state-test-prep/id6801668817)

Prepare for Massachusetts MCAS Math with grade-specific practice tests and daily sets for grades 3-8 and 10. Focus on specific topics or complete full-length simulations with detailed explanations and progress tracking for parents. One subscription covers up to five learners.

**Highlights:** Grade-specific practice (3-8, 10), Daily practice sets, Practice by topic, Full practice tests, Detailed answer explanations, Parent progress insights, Supports up to 5 learners

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MCAS Math Test Prep Monthly | $7.99 | per month |
| MCAS Math Test Prep Annual | $29.99 | per year |


## Frequently asked questions

### Is Solar System Scope free?

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

### Is TestByState free?

TestByState is free to download, with in-app purchases available.

### Which has better reviews, Solar System Scope or TestByState?

TestByState is rated higher. Solar System Scope averages 4.4 out of 5 from 882 ratings, while TestByState averages 5.0 from 1 ratings.

### Do Solar System Scope or TestByState have ads?

Neither Solar System Scope nor TestByState shows ads.

### Which is updated more often, Solar System Scope or TestByState?

Solar System Scope ships an update every 4 months, and TestByState weekly. Most recently, Solar System Scope was updated on October 12, 2026 and TestByState on October 16, 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.*