# Smart Diagnostic Centre vs Contrast X

The clearest difference is iOS requirement: Smart Diagnostic Centre at 8.2 against Contrast X's 15.1. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Smart Diagnostic Centre | Contrast X |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 2 months |
| Size | 49 MB | 25 MB |
| Requires iOS | **8.2** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [RYSUN LABS PRIVATE LIMITED](https://appshunter.io/developer/460946045) | [NEODREAM LLC](https://appshunter.io/developer/1550915825) |

## What reviewers say

### Smart Diagnostic Centre

[App page](https://appshunter.io/ios/app/smart-diagnostic-centre/id1266631347)

**In-app purchases:** none


### Contrast X

[App page](https://appshunter.io/ios/app/contrast-x/id6757217166)

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

**In-app purchases:** none


## Frequently asked questions

### Is Smart Diagnostic Centre free?

Smart Diagnostic Centre is free to download, with no in-app purchases.

### Is Contrast X free?

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

### Do Smart Diagnostic Centre or Contrast X have ads?

Neither Smart Diagnostic Centre nor Contrast X shows ads.

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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.*