# CMB Maps vs Stars Units Sizes Objects

The clearest difference is ads: CMB Maps at none against Stars Units Sizes Objects's shown. CMB Maps also leads on monetization model (free vs ad-supported) and iOS requirement (6.0 vs 11.0). Stars Units Sizes Objects's advantage is rating (4.2 vs 4.0) and review sentiment (80% vs 67%). On price, ratings volume, in-app purchases and device support there is nothing between them.

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, 4.2 against 4.0. Both are backed by a comparable volume of ratings — 14 and 5 respectively. Written reviews point the same way: 67% of CMB Maps's written reviews are positive against 80% of Stars Units Sizes Objects's.

## The numbers

| Metric | CMB Maps | Stars Units Sizes Objects |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (14 ratings)](https://appshunter.io/ios/app/cmb-maps/id894952449/reviews) | **[4.2 (5 ratings)](https://appshunter.io/ios/app/stars-units-sizes-objects/id1576148571/reviews)** |
| Number of ratings | **14** | 5 |
| Positive reviews | 66.7% of reviews | **80.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | — | Every 4 months |
| Monetization | **Free** | Ad-supported |
| Size | 57 MB | 124 MB |
| Requires iOS | **6.0** | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Qingqing Mao](https://appshunter.io/developer/894952452) | [Mudarmeen Munlin](https://appshunter.io/developer/1348165664) |

## What reviewers say

### CMB Maps

[App page](https://appshunter.io/ios/app/cmb-maps/id894952449)

Explore detailed all-sky maps of cosmic microwave background radiation from the Big Bang. Compare different generations of fluctuations in high resolution and view galactic coordinates and microwave sources.

**Highlights:** 4K resolution CMB maps, Compare multiple maps, Zoom and scroll for details, Sky reference map, Educational demonstration tool

**Features:** macOS Compatibility

**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 CMB Maps free?

CMB Maps 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, CMB Maps or Stars Units Sizes Objects?

Stars Units Sizes Objects is rated higher. CMB Maps averages 4.0 out of 5 from 14 ratings, while Stars Units Sizes Objects averages 4.2 from 5 ratings.

### Do CMB Maps or Stars Units Sizes Objects have ads?

Stars Units Sizes Objects shows ads; CMB Maps does not.

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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.*