# Stars Units Sizes Objects vs Multiplanetary Life

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.

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.

## The numbers

| Metric | Stars Units Sizes Objects | Multiplanetary Life |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (5 ratings)](https://appshunter.io/ios/app/stars-units-sizes-objects/id1576148571/reviews) | **[4.3 (3 ratings)](https://appshunter.io/ios/app/multiplanetary-life/id1670768848/reviews)** |
| Number of ratings | **5** | 3 |
| Positive reviews | 80.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Ad-supported | **Free** |
| Size | 124 MB | 56 MB |
| Requires iOS | **11.0** | 16.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Mudarmeen Munlin](https://appshunter.io/developer/1348165664) | [Marcus Grant](https://appshunter.io/developer/1616306440) |

## What reviewers say

### Stars Units Sizes Objects

[App page](https://appshunter.io/ios/app/stars-units-sizes-objects/id1576148571)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


### Multiplanetary Life

[App page](https://appshunter.io/ios/app/multiplanetary-life/id1670768848)

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.

**Highlights:** Planet exploration, Interactive quizzes, Detailed descriptions, Rocket information, Rover information, Solar System learning

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Stars Units Sizes Objects free?

Stars Units Sizes Objects is free to download, with no in-app purchases.

### Is Multiplanetary Life free?

Multiplanetary Life is free to download, with no in-app purchases.

### Which has better reviews, Stars Units Sizes Objects or Multiplanetary Life?

Multiplanetary Life is rated higher. Stars Units Sizes Objects averages 4.2 out of 5 from 5 ratings, while Multiplanetary Life averages 4.3 from 3 ratings.

### Do Stars Units Sizes Objects or Multiplanetary Life have ads?

Stars Units Sizes Objects shows ads; Multiplanetary Life does not.

### Which is updated more often, Stars Units Sizes Objects or Multiplanetary Life?

Stars Units Sizes Objects ships an update every 4 months, and Multiplanetary Life every 3 months. Most recently, Stars Units Sizes Objects was updated on September 7, 2026 and Multiplanetary Life on July 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*