# ExtCalc

> Scientific calculator with colorized formulas, calculation sheets, and cloud sync. (iPhone/iPad app by Matthias Weber.)

- Source: https://appshunter.io/ios/app/extcalc/id386132190 (this page in markdown: same URL + `.md`)
- Developer: [Matthias Weber](https://appshunter.io/developer/386132193)
- Category: Utilities, Business
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.7 · 7 MB
- Languages: American English
- Released: 2010-08-24
- Data updated: 2026-06-10
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/extcalc/id386132190/reviews.md

## What is ExtCalc?

ExtCalc is an innovative scientific calculator that makes operating computations easy. It shows your whole formula in a colorised text view. You can have different calculation sheets for different formulas or you just use one sheet for all your formulas. Deletion and memorizing results are integrated as well. Last, but not least, it includes a customizable constants pool and a VAT calculator.

All nifty features in a short list:
* Individual calculation sheets, with the possibility to print them
* Color highlighting
* Memorizing results, e.g. via the ANS button and through the calculation sheets, get old values by tapping on them in the sheet
* Many functions, even in portrait mode
* Grouping (brackets)
* Error proof, you can't input formulas that would lead to errors
* Constants pool, easily customizable
* iCloud support for synchronization between devices
* VAT calculator
* Apple Watch app
* Cloud synchronisation to stay up-to-date on all devices
* AR scene
* Print calculation sheets
* Dark Mode
* Strong focus on accessibility
* SharePlay to work in a team

Terms of Use:
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Privacy:
https://develicious-studios.de/privacy.html

## Key features

- Colorized formula view
- Individual calculation sheets
- Memorize results
- Customizable constants pool
- VAT calculator
- Cloud synchronization
- Apple Watch app

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Yearly Subscription | $4.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Printing | $0.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/extcalc/id386132190/reviews.md

### 1/5 — Vraiment nul

*2011-02-27*

Mérite un remboursement

## Frequently asked questions about ExtCalc

### What is ExtCalc?

ExtCalc is a scientific calculator designed for ease of use, featuring a colorized text view for formulas, individual calculation sheets, and result memorization. It also includes a VAT calculator and cloud synchronization across Apple devices.

### Does ExtCalc have ads?

No, ExtCalc does not contain advertisements. The app is free to download and use, with optional in-app purchases available.

### What devices does ExtCalc support?

ExtCalc is available on Mac, Apple TV, Apple Watch, iPhone, iPad, and Reality Device, offering a consistent experience across the Apple ecosystem.

### How often is ExtCalc updated?

The latest version of ExtCalc is 5.1, last updated on December 17, 2025. Updates typically include new features, bug fixes, and performance improvements.

### Can I use ExtCalc offline?

While cloud synchronization is a feature, the core calculation functionalities of ExtCalc are available offline. You can perform calculations and manage sheets without an active internet connection.

### What are the subscription options for ExtCalc?

ExtCalc offers a yearly subscription plan for $4.99. This subscription likely unlocks premium features or removes limitations, though specific details are not provided in the description.

### Is ExtCalc suitable for complex math problems?

Yes, ExtCalc is designed as an innovative scientific calculator with many functions, including grouping (brackets) and error-proofing, making it suitable for complex mathematical computations.

### How does ExtCalc handle privacy?

ExtCalc's privacy policy can be found at develicious-studios.de/privacy.html. The app focuses on user privacy, with features like iCloud support for synchronization.

## Version history (last 5 releases)

### 5.1 — 2025-12-17

We improved ExtCalc with SharePlay to work on calculations in a team,  added rounding options and changed the app icon for the new style.

### 5.0.1 — 2025-11-04

Fixed loading faulty databases

### 5.0 — 2025-09-19

We changed a lot: the design has changed drastically, leveraging the new Liquid Glass. It provides a cleaner navigation within the app and a colorised calculation view. Additionally, we enhanced accessibility a lot, so we hope that more people can easily use this app.

The Watch app can now operate on its own, it has a list of all sheets that you edited on e.g. your iPhone. It uses the last number and any new result will overwrite this result.

We changed to a subscription model for this version, as it is needed to further support the development of the app. Though, we provide a free trial period at the beginning, so you can see if you like this app (and we hope, you do ;-) ).

### 3.2 — 2020-12-01

Bugfixes and removal of ads.

### 3.1 — 2020-05-15

Important bugfixes and improvements.

## Apps similar to ExtCalc

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| --- | --- | --- | --- |
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| [Repeat Calc](https://appshunter.io/ios/app/repeat-calc/id1219801629) | — | Free | Utilities |
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## More apps by Matthias Weber

- [PistolShooutout](https://appshunter.io/ios/app/pistolshooutout/id1084628031)
- [wTimeRecorder](https://appshunter.io/ios/app/wtimerecorder/id1092058588)
- [BabyTapMe](https://appshunter.io/ios/app/babytapme/id1092065778)
- [BubblesToGo](https://appshunter.io/ios/app/bubblestogo/id6612023633)

All apps by Matthias Weber: https://appshunter.io/developer/386132193

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*