# Jupiter vs Stars Units Sizes Objects

The clearest difference is rating: Jupiter at 5.0 against Stars Units Sizes Objects's 4.2. Stars Units Sizes Objects's advantage is update cadence (every 4 months vs every 58 months) and iOS requirement (11.0 vs 16.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Jupiter holds the better App Store score, 5.0 against 4.2. Both are backed by a comparable volume of ratings — 2 and 5 respectively.

Jupiter ships an update every 58 months, Stars Units Sizes Objects every 4 months. The most recent releases landed on September 11, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Jupiter | Stars Units Sizes Objects |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/jupiter-juno/id1562173082/reviews)** | [4.2 (5 ratings)](https://appshunter.io/ios/app/stars-units-sizes-objects/id1576148571/reviews) |
| Number of ratings | 2 | **5** |
| Positive reviews | — | 80.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 58 months | **Every 4 months** |
| Monetization | Ad-supported | Ad-supported |
| Size | 153 MB | 124 MB |
| Requires iOS | 16.0 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 9+ | 4+ |
| Developer | [Alparslan Topbas](https://appshunter.io/developer/1130875171) | [Mudarmeen Munlin](https://appshunter.io/developer/1348165664) |

## What reviewers say

### Jupiter

[App page](https://appshunter.io/ios/app/jupiter-juno/id1562173082)

Explore Jupiter with stunning images and scientific insights from NASA's Juno mission. Features an immersive slideshow, interactive 3D models, and a dynamic video library for a deep-space educational experience.

**Highlights:** High-definition Jupiter images, Scientific insights for each image, Immersive full-screen slideshow, Dynamic video library, Interactive 3D models of Jupiter, Haptic feedback

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Jupiter free?

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

### Is Stars Units Sizes Objects free?

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

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

Jupiter is rated higher. Jupiter averages 5.0 out of 5 from 2 ratings, while Stars Units Sizes Objects averages 4.2 from 5 ratings.

### Do Jupiter or Stars Units Sizes Objects have ads?

Both Jupiter and Stars Units Sizes Objects show ads.

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

Jupiter ships an update every 58 months, and Stars Units Sizes Objects every 4 months. Most recently, Jupiter was updated on September 11, 2026 and Stars Units Sizes Objects on September 7, 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.*