# Terra vs GPT Solar System Explorer

The clearest difference is review sentiment: Terra at 100% against GPT Solar System Explorer's 0%. Terra also leads on in-app purchases (none vs 5) and rating (5.0 vs 4.7). GPT Solar System Explorer's advantage is update cadence (every 2 weeks vs every 3 months) and ratings volume (95 vs 1). On price, ads and device support there is nothing between them.

Both are free to download. GPT Solar System Explorer sells 5 in-app purchases, starting at $5.99 per month. Terra asks for nothing beyond the download.

Terra holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: GPT Solar System Explorer has 95 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 GPT Solar System Explorer's.

Terra ships an update every 3 months, GPT Solar System Explorer every 2 weeks. The most recent releases landed on October 7, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Terra | GPT Solar System Explorer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/terra/id1429068860/reviews)** | [4.7 (95 ratings)](https://appshunter.io/ios/app/gpt-solar-system-explorer/id6743086286/reviews) |
| Number of ratings | 1 | **95** |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | **Free** | Subscription |
| Size | 160 MB | 288 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Himalaya Computing](https://appshunter.io/developer/1205321932) | [Apic Ways](https://appshunter.io/developer/1635604961) |

## 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


### GPT Solar System Explorer

[App page](https://appshunter.io/ios/app/gpt-solar-system-explorer/id6743086286)

Explore our Solar System in an interactive 3D environment powered by AI. Discover stunning images and videos from space agencies, and ask your AI guide anything about the cosmos. Perfect for curious minds of all ages.

**Highlights:** Interactive 3D Solar System model, AI-powered cosmic guide, NASA, SpaceX, ESA imagery & videos, Planet and mission details, Voice-activated Q&A, Intuitive controls for all ages

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro Subscription | $5.99 | per month |
| Monthly Super Pro Subscription | $19.99 | per month |
| Monthly Ultra Pro Subscription | $29.99 | per month |
| Yearly Pro Subscription | $39.99 | per year |
| AI coins | $5.99 | one-time |


## Frequently asked questions

### Is Terra free?

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

### Is GPT Solar System Explorer free?

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

### Which has better reviews, Terra or GPT Solar System Explorer?

Terra is rated higher. Terra averages 5.0 out of 5 from 1 ratings, while GPT Solar System Explorer averages 4.7 from 95 ratings.

### Do Terra or GPT Solar System Explorer have ads?

Neither Terra nor GPT Solar System Explorer shows ads.

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

Terra ships an update every 3 months, and GPT Solar System Explorer every 2 weeks. Most recently, Terra was updated on October 7, 2026 and GPT Solar System Explorer on October 25, 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.*