# ОНЛАЙН vs GPT Solar System Explorer

The clearest difference is review sentiment: ОНЛАЙН at 100% against GPT Solar System Explorer's 0%. ОНЛАЙН also leads on in-app purchases (none vs 5) and iOS requirement (11.0 vs 15.0). On price, update cadence, 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. ОНЛАЙН asks for nothing beyond the download.

ОНЛАЙН ships an update weekly, GPT Solar System Explorer every 2 weeks. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | ОНЛАЙН | GPT Solar System Explorer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (96 ratings)](https://appshunter.io/ios/app/gpt-solar-system-explorer/id6743086286/reviews)** |
| Number of ratings | — | **96** |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | **Free** | Subscription |
| Size | 567 MB | 288 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Online School №1](https://appshunter.io/developer/1599516401) | [Apic Ways](https://appshunter.io/developer/1635604961) |

## What reviewers say

### ОНЛАЙН

[App page](https://appshunter.io/ios/app/ar/id6443659600)

Explore scientific topics through engaging lessons with audio, text, and immersive 3D/AR experiences. Learn about the solar system and test your knowledge with quizzes. Discover new facts and bring educational content into your room.

**Highlights:** Audio lessons, 3D visualizations, Augmented reality (AR) integration, Text-based learning, Astronomy topics, End-of-lesson quizzes

**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 ОНЛАЙН free?

ОНЛАЙН 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 ОНЛАЙН or GPT Solar System Explorer have ads?

Neither ОНЛАЙН nor GPT Solar System Explorer shows ads.

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

ОНЛАЙН ships an update weekly, and GPT Solar System Explorer every 2 weeks. Most recently, ОНЛАЙН was updated on November 3, 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.*