# SUDiver vs Stars Units Sizes Objects

The clearest difference is rating: Stars Units Sizes Objects at 4.2 against SUDiver's 3.0. Stars Units Sizes Objects also leads on iOS requirement (11.0 vs 15.6). SUDiver's advantage is ads (none vs shown) and update cadence (monthly vs every 4 months). 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 3.0. Both are backed by a comparable volume of ratings — 2 and 5 respectively.

SUDiver ships an update monthly, Stars Units Sizes Objects every 4 months. The most recent releases landed on October 1, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | SUDiver | Stars Units Sizes Objects |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/sudiver/id1294150341/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 | **No** | Yes |
| Update frequency | **Monthly** | Every 4 months |
| Monetization | **Free** | Ad-supported |
| Size | 7 MB | 124 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Diver Video LLC](https://appshunter.io/developer/412839658) | [Mudarmeen Munlin](https://appshunter.io/developer/1348165664) |

## What reviewers say

### SUDiver

[App page](https://appshunter.io/ios/app/sudiver/id1294150341)

This educational app brings Stanford University's digital interactive video exploration tools to mobile devices. It allows users to create and share time-space referenced video clips, enabling detailed analysis of any video content.

**Highlights:** Guided-noticing spatial and temporal video referencing, Touch interface for moving and resizing reference rectangles, Networked sharing of point-of-view video clips, Analysis of personal videos and YouTube content, Social sharing of video clips to platforms like Twitter and Facebook

**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 SUDiver free?

SUDiver 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, SUDiver or Stars Units Sizes Objects?

Stars Units Sizes Objects is rated higher. SUDiver averages 3.0 out of 5 from 2 ratings, while Stars Units Sizes Objects averages 4.2 from 5 ratings.

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

Stars Units Sizes Objects shows ads; SUDiver does not.

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

SUDiver ships an update monthly, and Stars Units Sizes Objects every 4 months. Most recently, SUDiver was updated on October 1, 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.*