# Epicentral vs GPT Solar System Explorer

The clearest difference is review sentiment: Epicentral at 75% against GPT Solar System Explorer's 0%. Epicentral also leads on in-app purchases (none vs 5). GPT Solar System Explorer's advantage is price (Free vs $0.99) and update cadence (every 2 weeks vs monthly). On ads and device support there is nothing between them.

GPT Solar System Explorer is free to download; Epicentral costs $0.99 up front. GPT Solar System Explorer sells 5 in-app purchases, starting at $5.99 per month. Epicentral asks for nothing beyond the download.

Epicentral ships an update monthly, GPT Solar System Explorer every 2 weeks. The most recent releases landed on October 31, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Epicentral | GPT Solar System Explorer |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[4.7 (96 ratings)](https://appshunter.io/ios/app/gpt-solar-system-explorer/id6743086286/reviews)** |
| Number of ratings | — | **96** |
| Positive reviews | **75.3% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | **Free** | Subscription |
| Size | 16 MB | 288 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Charles Ammon](https://appshunter.io/developer/297487706) | [Apic Ways](https://appshunter.io/developer/1635604961) |

## What reviewers say

### Epicentral

[App page](https://appshunter.io/ios/app/epicentral/id297487703)

Explore global earthquake patterns with real-time data and historical context. View recent seismic events on interactive maps and lists, with detailed summaries and links to official information. Understand current activity within the framework of historical seismicity.

**Highlights:** Real-time earthquake lists, Interactive earthquake maps, Daily, weekly, and monthly data views, Event summaries and details, Links to USGS earthquake information, Historical earthquake catalogs

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

**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 Epicentral free?

Epicentral costs $0.99, 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 Epicentral or GPT Solar System Explorer have ads?

Neither Epicentral nor GPT Solar System Explorer shows ads.

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

Epicentral ships an update monthly, and GPT Solar System Explorer every 2 weeks. Most recently, Epicentral was updated on October 31, 2026 and GPT Solar System Explorer on November 4, 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.*