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.
Solar System
Explore our solar system with detailed descriptions of the Sun, planets, and moon. Enjoy quality audio and comprehensive information to quickly grasp essential astronomical facts.
- Full solar system model
- Detailed object descriptions
- High-quality audio
- Comprehensive astronomical information
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Solar system Application, has sen created solely with the intention of helping an individual quickly grasp the essential information about our Solar system. Features: - Entire Solar System with the Sun, 8 Major planets and the moon. -Description of each object. -Quality Audio - Complete information
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 review sentiment: Stars Units Sizes Objects at 80% against Solar System's 38%. Stars Units Sizes Objects also leads on in-app purchases (none vs 1) and update cadence (every 4 months vs every 14 months). Solar System's advantage is ads (none vs shown) and ratings volume (25 vs 5). On price, device support and iOS requirement 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. 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: 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: 38% of Solar System's written reviews are positive against 80% of Stars Units Sizes Objects's.
Solar System ships an update every 14 months, Stars Units Sizes Objects every 4 months. The most recent releases landed on June 8, 2026 and September 7, 2026 respectively.
| Parameter | Solar System | Stars Units Sizes Objects |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (25 ratings) | 4.2 (5 ratings) — better |
| Positive reviews | 37.5% of reviews | 80.0% of reviews — better |
| Number of ratings | 25 — better | 5 |
| Update frequency | Every 14 months | Every 4 months — better |
| 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 | 11.0 | 11.0 |
| Further details — not scored | ||
| Size | 52 MB | 124 MB |
| Age rating | 4+ | 4+ |
| Developer | Magicbox Animation Private limited | Mudarmeen Munlin |
Customer experience
Solar System
Stars Units Sizes Objects
In-app purchases
Solar System
- Solar System$0.99
Stars Units Sizes Objects
No in-app purchases
Questions
Is Solar System free?
Is Stars Units Sizes Objects free?
Which has better reviews, Solar System or Stars Units Sizes Objects?
Do Solar System or Stars Units Sizes Objects have ads?
Which is updated more often, Solar System or Stars Units Sizes Objects?
Other comparisons
