Encyclopedia vs SolarSystem
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Encyclopedia
Explore the solar system with extensive articles and high-definition images. This app offers comprehensive information, engaging content, and a user-friendly interface, making it suitable for both children and adults interested in space.
- 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
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Travel through our celestial neighborhood in 386 illustrated articles on the Sun, planets, moons, smaller bodies and the history of solar-system exploration. START WITH FIVE FREE ARTICLES New readers can choose any five different articles. Your chosen articles stay unlocked, and revisiting them never uses another choice. Existing readers keep previously granted access. MAKE DISCOVERIES YOUR OWN • Search article titles and full text • Follow links between related topics • Save articles and return to your reading position • Continue recent reading and track your progress • Explore connections through the timeline and graph • Find article sources and image credits inside the app CHOOSE YOUR ACCESS Own the full encyclopedia with a one-time purchase for complete offline reading. Or choose monthly or annual Premium for the full encyclopedia plus AI chat grounded in this subject's articles. Eligible new Premium subscribers receive a three-day introductory trial. Subscriptions renew automatically unless canceled through your App Store account. Current local prices and terms appear before purchase. Restore Purchases recovers eligible previous purchases. Earlier full-version ownership includes encyclopedia and offline access; Premium AI requires a subscription. Internet access is required for AI chat and purchases. AI answers may contain errors; consult the linked sources. Article text is derived from Wikipedia. Images come from appropriately licensed Wikimedia Commons and other open sources. Source links, licenses and credits are available in the app. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
SolarSystem
Explore the solar system through immersive MR, VR, and AR experiences. Adjust settings for your device and preferred viewing mode to learn about planets and space.
- Mixed Reality (MR) mode
- Virtual Reality (VR) mode
- Augmented Reality (AR) mode
- Adjustable screen size
- Single eye/Dual eye mode
- Inter-pupillary distance correction
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iPhone 1: Start the app while tilting the iPhone 90 degrees left, then set the iPhone to the MR glass "Dangla". 2: You can check the menu by looking at Dangla. When only planetary motion is displayed or the menu does not display well in the field of view, tapping the left button of Dangla with the front facing will display the menu in the front. 3: With the body facing to the right, move the sphere cursor at the center of the screen to the right edge [System menu] of the three menus, and tap the right button (hereinafter "Select"). 4: Next, Select the [Screen size] at the left end of the menu, and a list of compatible models will appear. Select the iPhone model you are using, and then Select [Decision] to confirm the model you are using. 5: Select the scene you want to experience from the [MR] [VR] [AR] that on main menu, and enjoy the application. 6: While using the app, tap the left button of Dangla at any time to display the menu. The functions and roles of each menu are as follows. ***Menu immediately after app start or restart*** [Restart] Returns to the state(menu) immediately after the application start [front] Display the content (SolarSystem) to the Straight ahead. [System menu] Move to main menu ***Main menu*** [ScreenSize] Select the model from iPhone 6S to XS MAX ※ In order to fit the size of the iPhone screen to the size of the mirror and lens, the screen display will be relatively shrunk as the LCD screen size of the iPhone increases. [Two eyes / Single eye] Switch the single eye / both eyes mode [IPD] Correct inter-pupil distance by program [MR] Mixed reality mode, background image is displayed superimposed with live-action image through the half mirror [VR] Virtual reality mode, both solar system and background space display 3D produced images [AR] Augmented reality mode, background image is displayed superimposed with live-action image through iPhone camera [Startup setting] (a preliminary menu for developers) iPad 1: Start the app while tilting the iPad 90 degrees left. Since the iPad can not be put in a Dangla, please enjoy using single eye mode alone. (Explained in 5 :) 2: Menu is displayed on the screen of iPad. If you only see the planet or if the menu does not look well, tapping the lower left corner of the screen while facing the front will bring the menu to the front. 3: Point the your body to the right, place the sphere cursor on the [System menu] on the far right, and tap the lower right of the screen (hereinafter "Select"). 4: Next, Select the [Screen Size] at the left end of the menu to display the list of compatible models. Select (Not [Maximum XS-Max])[Minimum 6S-7-8 Full Screen] and Select [Decision]. 5: Next, Select [Two eyes / Single eye], and when the screen changes, Select [Single eye]. 6: While using the app, tap the lower left of the iPad screen at any time to display the menu. The function and role of each menu are the same as the above iPhone. 【please note】 ・ Do not use this app on public roads or places with many people. ・ Please be sure to play small children always in the safe with parents. ・ Don't aim "Dangla” at the sun. ・ Don't use in the two eyes mode if you are under the age of 13 in the developmental stage of vision ・ We do not compensate for the damage caused by using this application directly or indirectly.
Screenshots
Verdict
The clearest difference is rating: Encyclopedia at 3.8 against SolarSystem's 3.0. Encyclopedia also leads on ratings volume (14 vs 1). SolarSystem's advantage is in-app purchases (none vs 1) and iOS requirement (9.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Encyclopedia sells 1 one-off in-app purchase. SolarSystem asks for nothing beyond the download.
Encyclopedia holds the better App Store score, 3.8 against 3.0. That said, the two scores are not equally well evidenced: Encyclopedia has 14 ratings behind it against 1, so its average is the more settled of the two.
Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 4, 2026 and September 23, 2026 respectively.
| Parameter | Encyclopedia | SolarSystem |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (14 ratings) — better | 3.0 (1 ratings) |
| Positive reviews | 83.3% of reviews | — |
| Number of ratings | 14 — better | 1 |
| Update frequency | Monthly | Monthly |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 9.0 — better |
| Further details — not scored | ||
| Size | 322 MB | 89 MB |
| Age rating | 4+ | 4+ |
| Developer | Good Spider, LLC | Hologram Co.,Ltd. |
Customer experience
Encyclopedia
SolarSystem
In-app purchases
Encyclopedia
- Full Version$2.99
SolarSystem
No in-app purchases
Questions
Is Encyclopedia free?
Is SolarSystem free?
Which has better reviews, Encyclopedia or SolarSystem?
Do Encyclopedia or SolarSystem have ads?
Which is updated more often, Encyclopedia or SolarSystem?
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