# Formula Canvas vs Sigmakey

The clearest difference is iOS requirement: Formula Canvas at 16.0 against Sigmakey's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Formula Canvas sells 1 one-off in-app purchase and Sigmakey sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Formula Canvas | Sigmakey |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Size | 3 MB | 13 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [杏娣 吴](https://appshunter.io/developer/1275821426) | [Andrii Bashta](https://appshunter.io/developer/1547467775) |

## What reviewers say

### Formula Canvas

[App page](https://appshunter.io/ios/app/formula-canvas-math-editor/id6784556654)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Formula Canvas Pro | $4.99 | one-time |


### Sigmakey

[App page](https://appshunter.io/ios/app/sigmakey-math-keyboard/id6788025133)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sigmakey Pro | $9.99 | one-time |


## Frequently asked questions

### Is Formula Canvas free?

Formula Canvas is free to download, with in-app purchases available.

### Is Sigmakey free?

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

### Do Formula Canvas or Sigmakey have ads?

Neither Formula Canvas nor Sigmakey 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.*