# Ascent vs Stars Units Sizes Objects

The clearest difference is ads: Ascent at none against Stars Units Sizes Objects's shown. Ascent also leads on rating (4.6 vs 4.2) and monetization model (free vs ad-supported). Stars Units Sizes Objects's advantage is update cadence (every 4 months vs every 46 months) and device support (3 vs 1). On price 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.

Ascent holds the better App Store score, 4.6 against 4.2. Both are backed by a comparable volume of ratings — 16 and 5 respectively. Written reviews point the same way: 89% of Ascent's written reviews are positive against 80% of Stars Units Sizes Objects's.

Ascent ships an update every 46 months, Stars Units Sizes Objects every 4 months. The most recent releases landed on October 13, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Ascent | Stars Units Sizes Objects |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (16 ratings)](https://appshunter.io/ios/app/ascent-commemorating-shuttle/id473973416/reviews)** | [4.2 (5 ratings)](https://appshunter.io/ios/app/stars-units-sizes-objects/id1576148571/reviews) |
| Number of ratings | **16** | 5 |
| Positive reviews | **89.5% of reviews** | 80.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 46 months | **Every 4 months** |
| Monetization | **Free** | Ad-supported |
| Size | 731 MB | 124 MB |
| Requires iOS | **8.0** | 11.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [NASA](https://appshunter.io/developer/355542146) | [Mudarmeen Munlin](https://appshunter.io/developer/1348165664) |

## What reviewers say

### Ascent

[App page](https://appshunter.io/ios/app/ascent-commemorating-shuttle/id473973416)

Explore stunning Shuttle mission footage with commentary, additional scenes, and production notes. This educational compilation offers a deep dive into the STS-114, STS-117, and STS-124 missions.

**Highlights:** Ground-based Shuttle motion imagery, STS-114, STS-117, and STS-124 mission footage, Includes commentary, Additional scenes, Selected images, Production notes

**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 Ascent free?

Ascent 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, Ascent or Stars Units Sizes Objects?

Ascent is rated higher. Ascent averages 4.6 out of 5 from 16 ratings, while Stars Units Sizes Objects averages 4.2 from 5 ratings.

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

Stars Units Sizes Objects shows ads; Ascent does not.

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

Ascent ships an update every 46 months, and Stars Units Sizes Objects every 4 months. Most recently, Ascent was updated on October 13, 2026 and Stars Units Sizes Objects on September 22, 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.*