# ExtCalc vs VBoard Vision Keyboard

The clearest difference is price: ExtCalc at Free against VBoard Vision Keyboard's $4.99. ExtCalc also leads on device support (6 vs 3). VBoard Vision Keyboard's advantage is in-app purchases (none vs 2). On ads and iOS requirement there is nothing between them.

ExtCalc is free to download; VBoard Vision Keyboard costs $4.99 up front. ExtCalc sells 2 in-app purchases, starting at $4.99 per year. VBoard Vision Keyboard asks for nothing beyond the download.

## The numbers

| Metric | ExtCalc | VBoard Vision Keyboard |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 7 MB | 1 MB |
| Requires iOS | 18.7 | **17.0** |
| Devices | **iPhone, iPad, Mac, Apple TV, Apple Watch, Vision Pro** | iPhone, iPad, Vision Pro |
| Age rating | 4+ | 4+ |
| Developer | [Matthias Weber](https://appshunter.io/developer/386132193) | [Hemism LLC](https://appshunter.io/developer/1144837384) |

## What reviewers say

### ExtCalc

[App page](https://appshunter.io/ios/app/extcalc/id386132190)

This scientific calculator offers a colorized text view for formulas, allowing for individual calculation sheets and easy memorization of results. It features a customizable constants pool, VAT calculator, and cloud synchronization for seamless use across devices. Accessibility and team collaboration are also emphasized.

**Highlights:** Colorized formula view, Individual calculation sheets, Memorize results, Customizable constants pool, VAT calculator, Cloud synchronization, Apple Watch app

**Features:** Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly Subscription | $4.99 | per year |
| Printing | $0.99 | one-time |


### VBoard Vision Keyboard

[App page](https://appshunter.io/ios/app/vboard-vision-keyboard/id6477272160)

**In-app purchases:** none


## Frequently asked questions

### Is ExtCalc free?

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

### Is VBoard Vision Keyboard free?

VBoard Vision Keyboard costs $4.99, with no in-app purchases.

### Do ExtCalc or VBoard Vision Keyboard have ads?

Neither ExtCalc nor VBoard Vision Keyboard 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.*