# Ultra By DC vs RK Performance

The clearest difference is in-app purchases: Ultra By DC at none against RK Performance's 1. RK Performance's advantage is device support. On price and iOS requirement there is nothing between them.

Both are free to download. RK Performance sells 1 in-app purchase, starting at $399.99 per month. Ultra By DC asks for nothing beyond the download.

## The numbers

| Metric | Ultra By DC | RK Performance |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | — | Monthly |
| Size | 46 MB | 52 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Danielle Carr](https://appshunter.io/developer/1661142194) | [Robin Good LLC](https://appshunter.io/developer/1683914246) |

## What reviewers say

### Ultra By DC

[App page](https://appshunter.io/ios/app/ultra-by-dc/id1661142192)

**In-app purchases:** none


### RK Performance

[App page](https://appshunter.io/ios/app/rk-performance/id6448198421)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic Plan | $399.99 | per month |


## Frequently asked questions

### Is Ultra By DC free?

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

### Is RK Performance free?

RK Performance is free to download, with in-app purchases available.

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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.*