Intergalactic Solar System vs Stars Units Sizes Objects
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Intergalactic Solar System
Explore planets, moons, and countries in this space simulator mini-game. Learn astronomy and geography aligned with next-generation science standards. Discover the Milky Way galaxy and assess your knowledge through engaging gameplay.
- Planet and moon exploration
- Country geography learning
- Milky Way galaxy view
- Common Core aligned curriculum
- Proficiency assessment
- Engaging gameplay levels
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Intergalactic Education introduces Intergalactic Solar System, a mini-game that teaches about planets, moons, and countries. This space simulator lets you explore celestial bodies from the viewpoint of space itself. The latest edition adds the Milky Way as an observable galaxy. Intergalactic Solar System uses next generation science standards (Common Core aligned) astronomy and geography. (Follows standards ESS1.A, ESS1.B, and CCSS.ELA-LITERACY.RH.6-8.7) Try Intergalactic Solar System! Assess proficiency in Solar System knowledge according to educational standards. Rewarding levels of gameplay maintain engagement. You will forget you were doing astronomy and geography!
Stars Units Sizes Objects
Explore the vastness of the universe, from the smallest particles to the largest cosmic structures. Compare object sizes, view detailed images, and perform unit conversions across a wide range of astronomical scales. Learn about stars, galaxies, and the incredible distances between them.
- Compare object sizes
- View object images
- Pinch/Zoom and Pan images
- Unit conversion for distances
- Explore scales from Planck length to observable universe
- Learn about stars and galaxies
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Size of the smallest to largest objects and stars. Compare the size of objects in the universe. Object images. Pinch/Zoom image. Pan/Move image. Rotate image. Double tap to reset an image. From the smallest to the largest one. From planck length to observable universe. From Yoctometre, Zeptometre, Attometre, Femtometre, Picometre, Nanometre, Micro, Millimetre, Centimetre, Metre, KiloMetre, Lightyear, Parsecs, Billion Lightyears to 93 Billion Lightyears. Size of objects, particles, atoms, cells, stars and galaxies. Get to know the stars. Get to know the spaces. get to know the universe. How small is this world. How big is the universe. And How great is the creator. How far is the star distance from earth. Two way 18 distance unit conversion. planck length, yoctometer, zeptometer, attometer, femtometer, picometre, nanometre, micrometre, Millimeter, Centimeter, Meter, Kilometer, Inch, Foot, Mile, Astronomical, Lightyear, Parsecs. Perform auto conversion when picker is changed. Share conversion result. Reset unit convertor.
Screenshots
Verdict
The clearest difference is in-app purchases: Stars Units Sizes Objects at none against Intergalactic Solar System's 1. Stars Units Sizes Objects also leads on rating (4.2 vs 4.0) and review sentiment (80% vs 70%). Intergalactic Solar System's advantage is ads (none vs shown) and update cadence (monthly vs every 4 months). On price 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. Intergalactic Solar System sells 1 one-off in-app purchase. Stars Units Sizes Objects asks for nothing beyond the download.
Stars Units Sizes Objects holds the better App Store score, 4.2 against 4.0. That said, the two scores are not equally well evidenced: Intergalactic Solar System has 25 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 70% of Intergalactic Solar System's written reviews are positive against 80% of Stars Units Sizes Objects's.
Intergalactic Solar System ships an update monthly, Stars Units Sizes Objects every 4 months. The most recent releases landed on September 22, 2026 and September 7, 2026 respectively.
| Parameter | Intergalactic Solar System | Stars Units Sizes Objects |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (25 ratings) | 4.2 (5 ratings) — better |
| Positive reviews | 70.0% of reviews | 80.0% of reviews — better |
| Number of ratings | 25 — better | 5 |
| Update frequency | Monthly — better | Every 4 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 355 MB | 124 MB |
| Age rating | 4+ | 4+ |
| Developer | Intergalactic Education LLC | Mudarmeen Munlin |
Customer experience
Intergalactic Solar System
Stars Units Sizes Objects
In-app purchases
Intergalactic Solar System
- Access to Full Game$3.99
Stars Units Sizes Objects
No in-app purchases
Questions
Is Intergalactic Solar System free?
Is Stars Units Sizes Objects free?
Which has better reviews, Intergalactic Solar System or Stars Units Sizes Objects?
Do Intergalactic Solar System or Stars Units Sizes Objects have ads?
Which is updated more often, Intergalactic Solar System or Stars Units Sizes Objects?
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