# Crystal Flight vs BioViewer

The clearest difference is rating: Crystal Flight at 5.0 against BioViewer's 1.0. BioViewer's advantage is update cadence (every 9 days vs every 5 months). 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 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Crystal Flight ships an update every 5 months, BioViewer every 9 days. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Crystal Flight | BioViewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/crystal-flight/id1436396839/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/bioviewer/id1593006498/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 9 days** |
| Monetization | Free | Free |
| Size | 4 MB | 9 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad, Mac | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Jeff Weeks](https://appshunter.io/developer/326104308) | [Raul Monton Pinillos](https://appshunter.io/developer/1576884003) |

## What reviewers say

### 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


### BioViewer

[App page](https://appshunter.io/ios/app/bioviewer/id1593006498)

Visualize 3D molecular structures from .pdb files on iOS, iPadOS, and macOS. Features smooth rendering, drag-and-drop support, and publication-quality photo exports for detailed analysis.

**Highlights:** 3D molecular structure visualization, Supports .pdb and .xyz files, Drag and drop functionality, Photo Mode with high-quality exports, Multi-model PDB support, Optimized for ProMotion displays

**In-app purchases:** none


## Frequently asked questions

### Is Crystal Flight free?

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

### Is BioViewer free?

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

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

Crystal Flight is rated higher. Crystal Flight averages 5.0 out of 5 from 1 ratings, while BioViewer averages 1.0 from 1 ratings.

### Do Crystal Flight or BioViewer have ads?

Neither Crystal Flight nor BioViewer shows ads.

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

Crystal Flight ships an update every 5 months, and BioViewer every 9 days. Most recently, Crystal Flight was updated on November 2, 2026 and BioViewer on November 3, 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.*