# PerformanceTest Mobile vs Diskio

The clearest difference is price: PerformanceTest Mobile at Free against Diskio's $5.99. PerformanceTest Mobile also leads on ads (none vs shown) and review sentiment (53% vs 44%). Diskio's advantage is rating (3.9 vs 3.3) and update cadence (weekly vs every 6 weeks). On in-app purchases there is nothing between them.

PerformanceTest Mobile is free to download; Diskio costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Diskio holds the better App Store score, 3.9 against 3.3. Both are backed by a comparable volume of ratings — 56 and 17 respectively. Written reviews complicate that: 53% of PerformanceTest Mobile's written reviews are positive against 44% of Diskio's, so the app with the better star average is not the one people write more warmly about.

PerformanceTest Mobile ships an update every 6 weeks, Diskio weekly. The most recent releases landed on October 6, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | PerformanceTest Mobile | Diskio |
| --- | --- | --- |
| Price | **Free** | $5.99 |
| Rating | [3.3 (56 ratings)](https://appshunter.io/ios/app/performancetest-mobile/id494438360/reviews) | **[3.9 (17 ratings)](https://appshunter.io/ios/app/diskio-disk-and-ssd-speed-test/id6467768299/reviews)** |
| Number of ratings | **56** | 17 |
| Positive reviews | **52.8% of reviews** | 44.4% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Weekly** |
| Monetization | **Free** | Paid |
| Size | 88 MB | 9 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [PassMark Software Inc](https://appshunter.io/developer/494438363) | [Sergii Khliustin](https://appshunter.io/developer/1598605990) |

## What reviewers say

### PerformanceTest Mobile

[App page](https://appshunter.io/ios/app/performancetest-mobile/id494438360)

Objectively benchmark your mobile device's speed and performance with a suite of tests. Analyze CPU, disk, memory, and graphics capabilities to ensure your device is performing optimally. Track results online and make informed purchasing decisions.

**Highlights:** CPU speed tests, Disk read/write tests, Memory speed tests, 2D graphics rendering, 3D graphics rendering, Online result tracking

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Provides raw performance data
- 💡 Interesting for comparing devices
- 👍 Works well on older devices (historically)
- 👍 Useful for seeing processor temperature impact
- 👍 Good for before/after iOS update comparisons

**What reviewers complain about**

- 🐛 Frequent crashes on various iOS versions and devices
- 🐛 App looks old and outdated
- 🐛 Not updated for newer iOS versions
- 🐛 Tests are not strenuous enough
- 🐛 Inaccurate device model reporting

**Reported bugs**

- Crashes after graphics tests on iOS 18
- Auto-rotate orientation bug after benchmark
- Phone model reported incorrectly
- Tests not strenuous enough (limited 60FPS)
- App crashes on iOS 15.5

**Requested features**

- Update for newer iOS versions and devices
- Fix auto-rotate orientation bug
- Add more tests (like Android counterpart)
- Add comparison list/option to compare with common devices
- Add option to compare personal previous tests


### Diskio

[App page](https://appshunter.io/ios/app/diskio-disk-and-ssd-speed-test/id6467768299)

This utility app provides precise speed tests for all your storage devices, from internal iPhone storage to external USB drives. Customize test parameters for detailed insights and identify performance bottlenecks. It offers a simple three-step process to analyze your storage's true capabilities.

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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is PerformanceTest Mobile free?

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

### Is Diskio free?

Diskio costs $5.99, with no in-app purchases.

### Which has better reviews, PerformanceTest Mobile or Diskio?

Diskio is rated higher. PerformanceTest Mobile averages 3.3 out of 5 from 56 ratings, while Diskio averages 3.9 from 17 ratings.

### Do PerformanceTest Mobile or Diskio have ads?

Diskio shows ads; PerformanceTest Mobile does not.

### Which is updated more often, PerformanceTest Mobile or Diskio?

PerformanceTest Mobile ships an update every 6 weeks, and Diskio weekly. Most recently, PerformanceTest Mobile was updated on October 6, 2026 and Diskio on October 21, 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.*