Stars Units Sizes Objects vs Multiplanetary Life
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
Multiplanetary Life
Explore the planets of our Solar System with interactive quizzes and detailed descriptions. Learn about notable rockets and rovers, making astronomy engaging for young learners.
- Planet exploration
- Interactive quizzes
- Detailed descriptions
- Rocket information
- Rover information
- Solar System learning
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All in one space app that teaches all about the different planets in our Solar System, notable rockets, and rovers. Each planet has integrated quizzes, detailed descriptions and much more. This app is great for kids to learn more about Astronomy. Download this app if you want to learn more about: -Space -Physics -Rocket Engineering Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Private Policy: https://www.termsfeed.com/live/34638907-a7f9-4835-9c96-d633070e66b2
Screenshots
Verdict
The clearest difference is ads: Multiplanetary Life at none against Stars Units Sizes Objects's shown. Multiplanetary Life also leads on review sentiment (100% vs 80%) and monetization model (free vs ad-supported). Stars Units Sizes Objects's advantage is device support (3 vs 1) and iOS requirement (11.0 vs 16.2). On price, rating, ratings volume and update cadence 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.
On the App Store both sit at effectively the same score — 4.2 for Stars Units Sizes Objects against 4.3 for Multiplanetary Life. Both are backed by a comparable volume of ratings — 5 and 3 respectively. Written reviews are what separate them: 80% of Stars Units Sizes Objects's written reviews are positive against 100% of Multiplanetary Life's.
Stars Units Sizes Objects ships an update every 4 months, Multiplanetary Life every 3 months. The most recent releases landed on September 7, 2026 and July 8, 2026 respectively.
| Parameter | Stars Units Sizes Objects | Multiplanetary Life |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (5 ratings) | 4.3 (3 ratings) — better |
| Positive reviews | 80.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 5 — better | 3 |
| Update frequency | Every 4 months | Every 3 months — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 11.0 — better | 16.2 |
| Further details — not scored | ||
| Size | 124 MB | 56 MB |
| Age rating | 4+ | 17+ |
| Developer | Mudarmeen Munlin | Marcus Grant |
Customer experience
Stars Units Sizes Objects
Multiplanetary Life
In-app purchases
Stars Units Sizes Objects
No in-app purchases
Multiplanetary Life
No in-app purchases
Questions
Is Stars Units Sizes Objects free?
Is Multiplanetary Life free?
Which has better reviews, Stars Units Sizes Objects or Multiplanetary Life?
Do Stars Units Sizes Objects or Multiplanetary Life have ads?
Which is updated more often, Stars Units Sizes Objects or Multiplanetary Life?
Other comparisons
