# Jazz Disk Bench Pro vs GN Viewer

The clearest difference is price: GN Viewer at Free against Jazz Disk Bench Pro's $2.99. GN Viewer also leads on rating (5.0 vs 4.4). Jazz Disk Bench Pro's advantage is ads (none vs shown) and ratings volume (28 vs 1). On in-app purchases, device support and iOS requirement there is nothing between them.

GN Viewer is free to download; Jazz Disk Bench Pro costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

GN Viewer holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Jazz Disk Bench Pro has 28 ratings behind it against 1, so its average is the more settled of the two.

Jazz Disk Bench Pro ships an update every 5 days, GN Viewer every 2 weeks. The most recent releases landed on October 18, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Jazz Disk Bench Pro | GN Viewer |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [4.4 (28 ratings)](https://appshunter.io/ios/app/jazz-disk-bench-pro/id1298441490/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/gn-viewer/id6756170503/reviews)** |
| Number of ratings | **28** | 1 |
| Positive reviews | 78.3% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 5 days** | Every 2 weeks |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 66 MB | 44 MB |
| Requires iOS | 15.2 | **15.1** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Baofeng County Jixu Education Information Consulting Co., Ltd.](https://appshunter.io/developer/1298441489) | [Raymond Yang](https://appshunter.io/developer/1858820577) |

## What reviewers say

### Jazz Disk Bench Pro

[App page](https://appshunter.io/ios/app/jazz-disk-bench-pro/id1298441490)

This tool measures storage performance for SSDs, SD cards, and internal/external drives. It provides accurate data on throughput using industry-standard testing methods for sequential speeds, random IOPS, and stress testing.

**Highlights:** Sequential Speed Test, 4K Random IOPS, Pro Stress Test, External Storage Support, Benchmark Details

**Features:** Vision Pro support

**In-app purchases:** none


### GN Viewer

[App page](https://appshunter.io/ios/app/gn-viewer/id6756170503)

Create dynamic visual experiences by playing multiple videos, GIFs, and images simultaneously on a customizable canvas. This private, on-device media vault offers advanced slideshow features and secure storage without cloud reliance.

**Highlights:** Play multiple videos, GIFs, and images simultaneously, Resize, rotate, and arrange media freely, PIN-locked private vault for offline media storage, Save custom canvas layouts, Adjustable speed and shuffle for slideshows, Organize media with albums

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Jazz Disk Bench Pro free?

Jazz Disk Bench Pro costs $2.99, with no in-app purchases.

### Is GN Viewer free?

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

### Which has better reviews, Jazz Disk Bench Pro or GN Viewer?

GN Viewer is rated higher. Jazz Disk Bench Pro averages 4.4 out of 5 from 28 ratings, while GN Viewer averages 5.0 from 1 ratings.

### Do Jazz Disk Bench Pro or GN Viewer have ads?

GN Viewer shows ads; Jazz Disk Bench Pro does not.

### Which is updated more often, Jazz Disk Bench Pro or GN Viewer?

Jazz Disk Bench Pro ships an update every 5 days, and GN Viewer every 2 weeks. Most recently, Jazz Disk Bench Pro was updated on October 18, 2026 and GN Viewer on September 30, 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.*