SUDiver vs Crystal Flight
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SUDiver
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.
- 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
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The Diver app brings the original Stanford University Digital Interactive Video Exploration and Reflection (DIVER) project* to Apple's iPad and iPhone. Features of the new app include: • A touch interface implementation of Diver's "guided-noticing" spatial and temporal point-of-view video referencing; users can move & resize the Diver guided-noticing rectangle via iOS's familiar touch interface. • An updated implementation of Diver's networked/Internet sharing of point-of-view video clips– allowing for a) dives** directly on your own or anyone else's videos, and b) easy social sharing of dive clips. For more info about the app read the latest notes/documentation: https://app.diver.video/howto/diver_howto_442_01.php Please also see our EULA (end-user-licensing-agreement): https://app.diver.video/eula * For more info about the original Stanford University Diver project visit: https://diver.stanford.edu ** "Dives" are time/space referenced video clips made by (temporally) selecting sub-portions of a video and (spatially) highlighting areas of the video's frame.
Crystal Flight
Experience free flight within diverse crystal environments. Navigate your journey by simply tilting your iPhone or iPad to control direction.
- Free flight simulation
- Crystal environments
- Tilt-to-navigate controls
- iPhone and iPad support
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Fly freely in a variety of crystals. To navigate, simply tilt your iPhone or iPad in the direction you want to go.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | SUDiver | Crystal Flight |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) | 5.0 (1 ratings) — better |
| Number of ratings | 2 — better | 1 |
| Update frequency | Monthly — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 15.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 7 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Diver Video LLC | Jeff Weeks |
Customer experience
SUDiver
Crystal Flight
In-app purchases
SUDiver
No in-app purchases
Crystal Flight
No in-app purchases
Questions
Is SUDiver free?
Is Crystal Flight free?
Which has better reviews, SUDiver or Crystal Flight?
Do SUDiver or Crystal Flight have ads?
Which is updated more often, SUDiver or Crystal Flight?
Other comparisons
