# Diskio - Disk Speed Analyzer — Precise disk speed test

> Accurate disk speed testing for internal and external storage devices on iOS. (iPhone/iPad app by Sergii Khliustin.)

- Source: https://appshunter.io/ios/app/diskio-disk-speed-analyzer/id6467768299 (this page in markdown: same URL + `.md`)
- Developer: [Sergii Khliustin](https://appshunter.io/developer/1598605990)
- Category: Utilities, Productivity
- Price: $5.99 (on sale, was $9.99)
- Rating: 3.90/5 from 16 App Store ratings · 9 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 4 MB
- Languages: American English, Japanese, Chinese (Simplified, China), European Spanish, Ukrainian
- Released: 2023-10-02
- Data updated: 2026-09-02
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/diskio-disk-speed-analyzer/id6467768299/reviews.md

## What is Diskio?

Welcome to Diskio 2.0, the ultimate disk speed testing solution for iOS, now completely redesigned and more powerful than ever.

Experience Unmatched Precision:
Our advanced algorithms deliver the most accurate speed tests available for all your storage devices. Trust the numbers you see—they reflect true performance.

Test Any Storage Device:
From your iPhone's internal storage to external drives connected via USB-C or Lightning, Diskio measures them all with laboratory-grade precision.

Customized for Power Users:
Tailor your tests by adjusting file size and chunk size parameters to match your specific needs. Whether you're a tech enthusiast or IT professional, get the exact insights you require.

Simple Three-Step Process:
1. Select your storage location (internal or external)
2. Choose your test parameters
3. Get comprehensive results in seconds

Universally Compatible:
Works flawlessly with all iOS devices and external storage solutions including USB drives and SD cards. Regularly updated for the latest iOS versions.

Why Diskio Matters
• Identify performance bottlenecks before they impact your work
• Make informed purchases when investing in new storage
• Verify you're getting the speed you paid for
• Monitor drive health and performance over time

Download Diskio today and discover what your storage is truly capable of!

## Key features

- Precise disk speed testing
- Tests internal and external storage
- Customizable test parameters
- Simple three-step process
- Universally compatible with iOS devices
- Identifies performance bottlenecks

## Recent user reviews (9 of 9)

All indexed reviews: https://appshunter.io/ios/app/diskio-disk-speed-analyzer/id6467768299/reviews.md

### 5/5 — Wolf

*2026-08-02*

Super!

### 1/5 — 垃圾软件，每次结果都不准

*2026-03-19*

和其他软件差天上去去啦

### 1/5 — 每次测试数值差很多，这是不是不准啊

*2025-12-16*

每次测试数值差很多，这是不是不准啊

### 5/5 — Чудова апка

*2025-09-18*

Натхнення вам)

### 3/5 — Needs Dark mode

*2024-12-19*

Other than that, needs dark mode as my phone is on it but the app opens it in light.

**Developer response:** Hello, thanks for your review!
In 2.0.0 we added light and dark modes support. 
Enjoy!

### 1/5 — Problem mit Disk

*2024-05-03*

Mit externen Speichermedien wie SD Karten verweigert die App den Dienst. Es wird direkt nach dem Start des Tests immer ein Problem mit der Disk gemeldet und der Vorgang bricht ab. Unbrauchbar.

**Developer response:** Hello, thanks for your review!
Could you please check if you have enough free space on your SD card? Also check that it actually works with iOS. Try to create a file via Files app.

### 5/5 — Fantastic disk speed test app

*2024-01-11*

Once you open the app you need to go to the bottom and swipe up to get to the settings.

Choose your location = SSD, disk etc.
Test size choice = 1,2,3,4,5 GB
Chunck size choice =1,2,4,8,,16 MB
Run test and the READ & WRITE scores will show.  
*BONUS*  You get a message with your score. 
If your external drive is very fast, you have to read the sheer awesome message it displays in the end. Bravo Diskio programer(s)

### 3/5 — Not Sure I Can Trust Accuracy

*2023-10-26*

I’m trying to use Diskio to compare external storage access speeds on my 3rd Gen iPad Pro to my new iPhone 15 Pro.  I’m also using Blackmagic Disk Speed Test on my Mac Mini to compare Diskio results. 

Blackmagic is measuring about 680MB/s both read and write on an 800MB/s Sandisk SSD.  Diskio is reporting 7808 MB/s write and 958MB/s read on my iPhone and 3553 MB/s write with 625MB/s read on the iPad Pro.  Seems write speed is questionable AND the units probably should be Mb/s!

Ease of use is great. With the new USB C port on iPhones, more of you will be trying to measure speeds. This possibly could be the right tool if it were truly accurate.

**Developer response:** Hello, thanks for your review!
In 2.0.0, we fully reimplemented the algorithm, so you can now trust the accuracy of the results.
Enjoy!

### 5/5 — Danke für diese App!

*2023-10-03*

Eine wirklich brauchbare App! Habe lange danach gesucht und endlich gefunden! Dankeschön!

## Frequently asked questions about Diskio

### What is Diskio?

Diskio is a utility app designed to perform precise speed tests on all your storage devices, including internal iPhone storage and external drives connected via USB-C or Lightning. It helps you understand your storage's true performance.

### How does Diskio test disk speed?

Diskio uses advanced algorithms to deliver accurate speed tests. You can select your storage location, choose test parameters like file size and chunk size, and then get comprehensive results.

### What devices does Diskio support?

Diskio is universally compatible with all iOS devices, including iPhones and iPods, and works with external storage solutions like USB drives and SD cards.

### How much does Diskio cost?

Diskio is a paid application, priced at $5.99. This one-time purchase grants you access to its full suite of disk speed testing features.

### How often is Diskio updated?

Diskio was last updated on June 3, 2025, with version 2.1.0. It is regularly updated to ensure compatibility with the latest iOS versions and to enhance its features.

### What is the age rating for Diskio?

Diskio has an age rating of 4+, making it suitable for a wide range of users. This indicates it contains no mature content.

### Does Diskio have ads?

Yes, Diskio contains advertisements. As a paid application, these ads are part of the user experience.

### What are the benefits of using Diskio?

Diskio helps you identify performance bottlenecks, make informed storage purchase decisions, verify advertised speeds, and monitor drive health over time, ensuring you get the most out of your storage.

## Version history (last 5 releases)

### 2.1.0 — 2025-06-03

Welcome to Diskio 2.0! We've completely reimagined your favorite disk speed testing app!
- Enhanced Testing Engine - Our improved algorithm delivers even more precise results, giving you the most accurate storage performance metrics available.
- ¡Hola! こんにちは! 你好! Now fully localized in Spanish, Japanese, and Chinese, bringing professional-grade disk testing to more users worldwide.
- Light Theme Support - Experience Diskio in a fresh new look! Perfect for daytime use with a clean, modern interface.
- Performance Optimizations - Faster, smoother testing process with improved reliability for all your connected storage devices.
Upgrade today and discover what your drives are truly capable of!

### 2.0.1 — 2025-03-23

Fixed crash on start on some devices

Welcome to Diskio 2.0! We've completely reimagined your favorite disk speed testing app!
- Enhanced Testing Engine - Our improved algorithm delivers even more precise results, giving you the most accurate storage performance metrics available.
- ¡Hola! こんにちは! Now fully localized in Spanish and Japanese, bringing professional-grade disk testing to more users worldwide.
- Light Theme Support - Experience Diskio in a fresh new look! Perfect for daytime use with a clean, modern interface.
- Performance Optimizations - Faster, smoother testing process with improved reliability for all your connected storage devices.
Upgrade today and discover what your drives are truly capable of!

### 2.0.0 — 2025-03-22

Welcome to Diskio 2.0! We've completely reimagined your favorite disk speed testing app!
- Enhanced Testing Engine - Our improved algorithm delivers even more precise results, giving you the most accurate storage performance metrics available.
- ¡Hola! こんにちは! Now fully localized in Spanish and Japanese, bringing professional-grade disk testing to more users worldwide.
- Light Theme Support - Experience Diskio in a fresh new look! Perfect for daytime use with a clean, modern interface.
- Performance Optimizations - Faster, smoother testing process with improved reliability for all your connected storage devices.
Upgrade today and discover what your drives are truly capable of!

### 1.0.5 — 2023-10-25

- Improved stability

### 1.0.4 — 2023-10-23

- Improved stability

## Apps similar to Diskio

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| [SSD Performance Test](https://appshunter.io/ios/app/ssd-performance-test/id6740139555) | — | Free | Utilities |
| [Jazz Disk Bench Pro](https://appshunter.io/ios/app/jazz-disk-bench-pro/id1298441490) | 4.4 (28) | $2.99 | Utilities |
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| [Geekbench AI](https://appshunter.io/ios/app/geekbench-ai/id1563487010) | 4.2 (33) | Free | Utilities |
| [REC Disk Speed Test](https://appshunter.io/ios/app/rec-disk-speed-test/id6470208081) | 3.8 (5) | Free | Utilities |

## More apps by Sergii Khliustin

- [Buildio - Bitrise client](https://appshunter.io/ios/app/buildio-bitrise-client/id1598605988)
- [NoPapel - Receipts splitting](https://appshunter.io/ios/app/nopapel-receipts-splitting/id6743413760)

All apps by Sergii Khliustin: https://appshunter.io/developer/1598605990

## Related topics

[disk speed](https://appshunter.io/ios/topics/disk-speed) · [disk speed test](https://appshunter.io/ios/topics/disk-speed-test) · [rec disk speed test](https://appshunter.io/ios/topics/rec-disk-speed-test)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-02.*