# Terra vs Solar System Planets

The clearest difference is review sentiment: Terra at 100% against Solar System Planets's 0%. Terra also leads on rating (5.0 vs 3.3) and in-app purchases (none vs 3). Solar System Planets's advantage is ratings volume (10 vs 1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Solar System Planets sells 3 in-app purchases, starting at $9.99 per month. Terra asks for nothing beyond the download.

Terra holds the better App Store score, 5.0 against 3.3. That said, the two scores are not equally well evidenced: Solar System Planets has 10 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of Terra's written reviews are positive against 0% of Solar System Planets's.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 7, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Terra | Solar System Planets |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/terra/id1429068860/reviews)** | [3.3 (10 ratings)](https://appshunter.io/ios/app/solar-system-planets-3d-space/id6463002338/reviews) |
| Number of ratings | 1 | **10** |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 160 MB | 150 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Himalaya Computing](https://appshunter.io/developer/1205321932) | [Evgeniya Senchurova](https://appshunter.io/developer/1676838995) |

## What reviewers say

### Terra

[App page](https://appshunter.io/ios/app/terra/id1429068860)

Explore a 3D model of the NASA Terra satellite, its equipment, and data products. Learn about its functions, instruments, and Earth observation capabilities through interactive simulations and visualizations.

**Highlights:** Interactive 3D satellite model, Detailed instrument information, Simulated satellite flybys, MODIS instrument visualization, ASTER data product display, Earth observation data

**Features:** macOS Compatibility

**In-app purchases:** none


### Solar System Planets

[App page](https://appshunter.io/ios/app/solar-system-planets-3d-space/id6463002338)

Explore our solar system with interactive 3D models and detailed information about each planet. Discover celestial bodies and uncover their secrets through a user-friendly interface, perfect for students and space enthusiasts alike.

**Highlights:** Interactive 3D solar system model, High-resolution planet imagery, Detailed planet information, User-friendly interface, Educational content, Celestial body exploration

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Month Premium Access | $9.99 | per month |
| Three Months Premium Access | $19.99 | per 3 months |
| One Year Premium Access | $24.99 | per year |


## Frequently asked questions

### Is Terra free?

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

### Is Solar System Planets free?

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

### Which has better reviews, Terra or Solar System Planets?

Terra is rated higher. Terra averages 5.0 out of 5 from 1 ratings, while Solar System Planets averages 3.3 from 10 ratings.

### Do Terra or Solar System Planets have ads?

Neither Terra nor Solar System Planets shows ads.

### Which is updated more often, Terra or Solar System Planets?

Terra ships an update every 3 months, and Solar System Planets every 3 months. Most recently, Terra was updated on October 7, 2026 and Solar System Planets on October 15, 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.*