# Math Keyboard vs Sigmakey

Math Keyboard and Sigmakey are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Math Keyboard 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 | Math Keyboard | Sigmakey |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.5 (4 ratings)](https://appshunter.io/ios/app/math-keyboard-formula-input/id6757350527/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | — |
| Monetization | Free with in-app purchases | — |
| Size | 2 MB | 13 MB |
| Requires iOS | 26.2 | **26.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yuta Nishimatsu](https://appshunter.io/developer/1480004995) | [Andrii Bashta](https://appshunter.io/developer/1547467775) |

## What reviewers say

### Math Keyboard

[App page](https://appshunter.io/ios/app/math-keyboard-formula-input/id6757350527)

This custom keyboard simplifies typing mathematical and physics symbols, including Greek letters and superscripts/subscripts. Seamlessly input formulas into any app without needing to copy and paste from external sources. Enhance your notes, reports, and messages with ease.

**Highlights:** Superscripts/subscripts for numbers, letters, and symbols, Greek letters support, Wide variety of math symbols, Familiar keyboard layout, Quick tab switching, Cursor control via long-press

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MathKeyboard Pro | $5.99 | 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 Math Keyboard free?

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

### Is Sigmakey free?

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

### Do Math Keyboard or Sigmakey have ads?

Neither Math Keyboard 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.*