# SUDiver vs Crystal Flight

The clearest difference is rating: Crystal Flight at 5.0 against SUDiver's 3.0. SUDiver's advantage is update cadence (monthly vs every 5 months) and iOS requirement (15.6 vs 17.0). 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.

Crystal Flight holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

SUDiver ships an update monthly, Crystal Flight every 5 months. The most recent releases landed on October 1, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | SUDiver | Crystal Flight |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/sudiver/id1294150341/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/crystal-flight/id1436396839/reviews)** |
| Number of ratings | **2** | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 months |
| Monetization | Free | Free |
| Size | 7 MB | 4 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Diver Video LLC](https://appshunter.io/developer/412839658) | [Jeff Weeks](https://appshunter.io/developer/326104308) |

## 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


### Crystal Flight

[App page](https://appshunter.io/ios/app/crystal-flight/id1436396839)

Experience free flight within diverse crystal environments. Navigate your journey by simply tilting your iPhone or iPad to control direction.

**Highlights:** Free flight simulation, Crystal environments, Tilt-to-navigate controls, iPhone and iPad support

**In-app purchases:** none


## Frequently asked questions

### Is SUDiver free?

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

### Is Crystal Flight free?

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

### Which has better reviews, SUDiver or Crystal Flight?

Crystal Flight is rated higher. SUDiver averages 3.0 out of 5 from 2 ratings, while Crystal Flight averages 5.0 from 1 ratings.

### Do SUDiver or Crystal Flight have ads?

Neither SUDiver nor Crystal Flight shows ads.

### Which is updated more often, SUDiver or Crystal Flight?

SUDiver ships an update monthly, and Crystal Flight every 5 months. Most recently, SUDiver was updated on October 1, 2026 and Crystal Flight on October 2, 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.*