# CAFS研究生 vs GPT Solar System Explorer

The clearest difference is in-app purchases: CAFS研究生 at none against GPT Solar System Explorer's 5. CAFS研究生 also leads on iOS requirement (13.0 vs 15.0). GPT Solar System Explorer's advantage is update cadence (every 2 weeks vs every 2 months). 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. CAFS研究生 asks for nothing beyond the download.

CAFS研究生 ships an update every 2 months, GPT Solar System Explorer every 2 weeks. The most recent releases landed on September 15, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | CAFS研究生 | GPT Solar System Explorer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (90 ratings)](https://appshunter.io/ios/app/gpt-solar-system-explorer/id6743086286/reviews)** |
| Number of ratings | — | **90** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | — | Subscription |
| Size | 31 MB | 288 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Beijing Hongke Baiyi Software Technology Co., Ltd.](https://appshunter.io/developer/1494077788) | [Apic Ways](https://appshunter.io/developer/1635604961) |

## What reviewers say

### CAFS研究生

[App page](https://appshunter.io/ios/app/cafs/id1529694085)

**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 CAFS研究生 free?

CAFS研究生 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.

### Do CAFS研究生 or GPT Solar System Explorer have ads?

Neither CAFS研究生 nor GPT Solar System Explorer shows ads.

### Which is updated more often, CAFS研究生 or GPT Solar System Explorer?

CAFS研究生 ships an update every 2 months, and GPT Solar System Explorer every 2 weeks. Most recently, CAFS研究生 was updated on September 15, 2026 and GPT Solar System Explorer on September 21, 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.*