# Sigmakey vs Uniboard

The clearest difference is in-app purchases: Uniboard at none against Sigmakey's 1. Uniboard also leads on iOS requirement (17.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Sigmakey sells 1 one-off in-app purchase. Uniboard asks for nothing beyond the download.

## The numbers

| Metric | Sigmakey | Uniboard |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/sigmakey-math-keyboard/id6788025133/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | — | Every 3 days |
| Monetization | Free with in-app purchases | — |
| Size | 13 MB | 49 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Andrii Bashta](https://appshunter.io/developer/1547467775) | [Kitta Co.](https://appshunter.io/developer/1896674871) |

## What reviewers say

### Sigmakey

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

This utility provides a specialized keyboard for typing mathematical expressions, including fractions, roots, and Greek letters, directly within any app. It supports LaTeX, Unicode, and image output, with on-device processing for privacy and speed.

**Highlights:** Full math keyboard layout, Two-dimensional cursor for exponents/numerators, Type LaTeX, Unicode, or rendered image, On-device typesetting, no network required, Symbol search, recent, and favorite symbols

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

**In-app purchases (1)**

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


### Uniboard

[App page](https://appshunter.io/ios/app/uniboard-unicode-keyboard/id6818750518)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sigmakey free?

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

### Is Uniboard free?

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

### Do Sigmakey or Uniboard have ads?

Neither Sigmakey nor Uniboard 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.*