My 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.
My Solar System
Become the creator of the universe by placing planets in their correct orbits. Experience the forces of gravity as planets interact with each other and the sun. Test your knowledge of planetary order and aim for a high score in this educational simulation.
- Create and place planets
- Simulate gravity between celestial bodies
- Observe planetary orbits
- Test knowledge of planet order
- Score-based progression
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Try yourself as the Great Creator and the Owner of the Universe! Put your just created planets in their right place and watch gravity do its part. Gravity formula considers not only Sun's gravity but also gravity between the planets. Be careful speeding up the planets. If speed is too high a planet may leave its orbit and fly away, whereas the law speed will draw a planet to the Sun. Be observer of a unique world creation and try to level up your score by putting planets in the correct order. Know planets' order? With this app you'll never forget it! Music by Anton Delorosa
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 rating: Stars Units Sizes Objects at 4.3 against My Solar System's 2.4. Stars Units Sizes Objects also leads on review sentiment (80% vs 42%). My Solar System's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Stars Units Sizes Objects holds the better App Store score, 4.3 against 2.4. Both are backed by a comparable volume of ratings — 24 and 6 respectively. Written reviews point the same way: 42% of My Solar System's written reviews are positive against 80% of Stars Units Sizes Objects's.
| Parameter | My Solar System | Stars Units Sizes Objects |
|---|---|---|
| Price | Free | Free |
| Rating | 2.4 (24 ratings) | 4.3 (6 ratings) — better |
| Positive reviews | 41.7% of reviews | 80.0% of reviews — better |
| Number of ratings | 24 — better | 6 |
| Update frequency | — | Every 4 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.3 — better | 11.0 |
| Further details — not scored | ||
| Size | 33 MB | 124 MB |
| Age rating | 4+ | 4+ |
| Developer | ALEXANDER SKALOV | Mudarmeen Munlin |
Customer experience
My Solar System
Stars Units Sizes Objects
In-app purchases
My Solar System
No in-app purchases
Stars Units Sizes Objects
No in-app purchases
Questions
Is My Solar System free?
Is Stars Units Sizes Objects free?
Which has better reviews, My Solar System or Stars Units Sizes Objects?
Do My Solar System or Stars Units Sizes Objects have ads?
Other comparisons
