# Encyclopedia: Solar System — Planets, missions, discovery

> Comprehensive offline encyclopedia of the solar system with articles, images, and badges. (iPhone/iPad app by Good Spider, LLC.)

- Source: https://appshunter.io/ios/app/encyclopedia-solar-system/id1124568774 (this page in markdown: same URL + `.md`)
- Developer: [Good Spider, LLC](https://appshunter.io/developer/1487595667)
- Category: Education, Books
- Price: Free with in-app purchases
- Rating: 3.80/5 from 14 App Store ratings · 6 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 322 MB
- Languages: American English
- Released: 2016-06-29
- Data updated: 2026-09-03
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/encyclopedia-solar-system/id1124568774/reviews.md

## What is Encyclopedia?

Explore 386 illustrated articles about planets, moons, dwarf planets, asteroids, comets, astronomy, missions, discoveries, and the science of our solar system.

Search article titles and full text, open clear article pages, and follow linked topics without losing your place. Reading progress and themed badges help you build a path through the collection.

Explore the solar system from several angles:

- Timeline view follows discoveries, missions, scientists, and changing ideas.
- Graph view reveals relationships between worlds, spacecraft, people, and concepts.
- Map view adds geographic context for observatories, discoveries, and missions where source material provides it.
- References and image credits keep source attribution visible.

Thirty articles are free to read. A one-time purchase unlocks the complete encyclopedia for offline reading, including maps, timelines, and graphs. Monthly or annual Premium includes the complete encyclopedia plus AI chat, with a seven-day free trial for eligible new subscribers. People who bought the original Full Version can restore permanent offline encyclopedia access; AI chat remains a separate Premium feature.

AI chat answers grounded questions about the solar system and links back to relevant articles so you can continue reading and check the context.

Article text is adapted from Wikipedia contributors under Creative Commons Attribution-ShareAlike 4.0. Every article includes source, revision-history, and image-credit links.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Key features

- Thousands of articles and HD photos
- Comprehensive solar system information
- Engaging and easy-to-understand content
- Offline availability
- Badge collection for reading
- Intuitive user interface

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Full Version | $2.99 | one-time |


## Recent user reviews (6 of 6)

All indexed reviews: https://appshunter.io/ios/app/encyclopedia-solar-system/id1124568774/reviews.md

### 1/5 — very poorly executed

*2023-12-29*

i don’t get why articles copied directly from wikipedia are paywalled
even the most basic objects (like EARTH) are kept premium
not only that, but the articles are very outdated
gonggong is still shown as unnamed and it’s almost 2024

### 4/5 — Was nice at the start, but you have to pay

*2022-01-04*

So, I was looking for some nice solar system apps that I could use for info, found this, read reviews, took a shot. As soon as I search for something like Nereid, Iapetus, they involve me paying, not even Saturn is a free article in this, I wish you didn’t have to pay and then this would be a 5 star app.

### 5/5 — AMAZING

*2020-09-07*

Works perfectly. No faults. Totally recommend.

### 5/5 — What I was looking for

*2016-07-21*

This is exactly that what I was looking for. It helps me to learn about the solar system.

### 5/5 — Informative

*2016-07-18*

This app is very informative as well as very heplful.

### 5/5 — Great job

*2016-07-18*

Best Encyclopedia of the Solar System. Enjoy it lots.

## Frequently asked questions about Encyclopedia

### What is the CHI Encyclopedia of the Solar System?

The CHI Encyclopedia of the Solar System is an educational application that provides detailed articles and high-definition images about celestial bodies. It aims to offer comprehensive and engaging information about our solar system for users of all ages.

### Can I use the CHI Encyclopedia of the Solar System offline?

Yes, the CHI Encyclopedia of the Solar System is available entirely offline. This allows you to access its content for learning about space even when you don't have an internet connection, such as during car rides or flights.

### What kind of content does the CHI Encyclopedia of the Solar System offer?

The app features thousands of articles and beautiful HD photos covering all bodies of the solar system from A-Z. The content is designed to be relevant, nicely written, engaging, and easy to understand.

### How does the CHI Encyclopedia of the Solar System motivate users to learn?

The app includes a system to motivate users by allowing them to collect different badges. These badges are awarded for reading select articles or groups of articles, encouraging continued exploration of the solar system's information.

### Is the CHI Encyclopedia of the Solar System suitable for children?

Yes, the app is great for all ages and can serve as a kid's encyclopedia to help them learn about the solar system. Its content is designed to be engaging and easy to understand for younger learners.

### What devices is the CHI Encyclopedia of the Solar System compatible with?

The CHI Encyclopedia of the Solar System looks stunning and is available on iPhone, iPad, and iPod. It is designed to provide an excellent user experience across these Apple devices.

### How often is the CHI Encyclopedia of the Solar System updated?

The CHI Encyclopedia of the Solar System was last updated on July 29, 2016, with version 1.0.2. The initial release date was June 29, 2016.

### What is the user rating for the CHI Encyclopedia of the Solar System?

The CHI Encyclopedia of the Solar System has a rating of 3.7 stars based on 13 ratings. This indicates a generally positive but mixed user reception.

## Version history (last 3 releases)

### 26.8.26 — 2026-08-31

A complete encyclopedia refresh with improved search, reading progress, navigation, free sampling, offline access, visual exploration, and AI chat.

### 1.0.2 — 2016-07-29

This app has been updated by Apple to display the Apple Watch app icon.

New Look & Feel.

### 1.0 — 2016-06-29

No release notes.

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## More apps by Good Spider, LLC

- [The Encyclopedia of Airliners](https://appshunter.io/ios/app/the-encyclopedia-of-airliners/id1036268445)
- [Encyclopedia of Animals](https://appshunter.io/ios/app/encyclopedia-of-animals/id1082571138)
- [CHI Encyclopedia of Music](https://appshunter.io/ios/app/chi-encyclopedia-of-music/id1122036466)
- [Encyclopedia of Cats](https://appshunter.io/ios/app/encyclopedia-of-cats/id1122519824)
- [Encyclopedia of Dogs](https://appshunter.io/ios/app/encyclopedia-of-dogs/id1122543308)
- [Greek Mythology](https://appshunter.io/ios/app/greek-mythology/id1122556787)

All apps by Good Spider, LLC: https://appshunter.io/developer/1487595667

## Related topics

[chi encyclopedia of the solar system](https://appshunter.io/ios/topics/chi-encyclopedia-of-the-solar-system) · [cloudlabs the solar system](https://appshunter.io/ios/topics/cloudlabs-the-solar-system)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-03.*