# OnStep Controller vs 3D Grapher

The clearest difference is in-app purchases: OnStep Controller at none against 3D Grapher's 1. OnStep Controller also leads on ads (none vs shown). 3D Grapher's advantage is iOS requirement (13.0 vs 17.0). On price and device support there is nothing between them.

Both are free to download. 3D Grapher sells 1 in-app purchase, starting at $9.99 per year. OnStep Controller asks for nothing beyond the download.

## The numbers

| Metric | OnStep Controller | 3D Grapher |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Every 5 days |
| Size | 7 MB | 30 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Gray Digital Arts LLC](https://appshunter.io/developer/1895978400) | [MOHAMMED BENLAHBIB](https://appshunter.io/developer/972731719) |

## What reviewers say

### OnStep Controller

[App page](https://appshunter.io/ios/app/onstep-controller-gda/id6765521295)

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

**In-app purchases:** none


### 3D Grapher

[App page](https://appshunter.io/ios/app/3d-grapher-ar-calculator/id6771080715)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $9.99 | per year |


## Frequently asked questions

### Is OnStep Controller free?

OnStep Controller is free to download, with no in-app purchases.

### Is 3D Grapher free?

3D Grapher is free to download, with in-app purchases available.

### Do OnStep Controller or 3D Grapher have ads?

3D Grapher shows ads; OnStep Controller does not.

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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.*