# Diskio vs OBsmart Ultra

The clearest difference is price: OBsmart Ultra at Free against Diskio's $5.99. OBsmart Ultra also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.0). Diskio's advantage is update cadence (every 5 days vs every 3 weeks). On in-app purchases and device support there is nothing between them.

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

Diskio ships an update every 5 days, OBsmart Ultra every 3 weeks. The most recent releases landed on September 24, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Diskio | OBsmart Ultra |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Rating | **[3.9 (17 ratings)](https://appshunter.io/ios/app/diskio-disk-speed-analyzer/id6467768299/reviews)** | — |
| Number of ratings | **17** | — |
| Positive reviews | 44.4% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Every 3 weeks |
| Monetization | Paid | — |
| Size | 4 MB | 25 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sergii Khliustin](https://appshunter.io/developer/1598605990) | [晓婷 谭](https://appshunter.io/developer/1884030144) |

## What reviewers say

### Diskio

[App page](https://appshunter.io/ios/app/diskio-disk-speed-analyzer/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


### OBsmart Ultra

[App page](https://appshunter.io/ios/app/obsmart-ultra/id6761351263)

**In-app purchases:** none


## Frequently asked questions

### Is Diskio free?

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

### Is OBsmart Ultra free?

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

### Do Diskio or OBsmart Ultra have ads?

Diskio shows ads; OBsmart Ultra does not.

### Which is updated more often, Diskio or OBsmart Ultra?

Diskio ships an update every 5 days, and OBsmart Ultra every 3 weeks. Most recently, Diskio was updated on September 24, 2026 and OBsmart Ultra on September 18, 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.*