# Calctan — Pocket Calculator

> A customizable, advanced calculator app for iOS with iCloud sync and multitasking. (iPhone/iPad app by Jorge Lozada.)

- Source: https://appshunter.io/ios/app/calctan/id1445480535 (this page in markdown: same URL + `.md`)
- Developer: [Jorge Lozada](https://appshunter.io/developer/421852863)
- Category: Utilities, Finance
- Price: Free with in-app purchases (on sale, was $1.99)
- Rating: 4.50/5 from 61 App Store ratings · 7 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.6 · 11 MB
- Languages: American English, Arabic, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French (France), German (Germany) and 21 more
- Released: 2018-12-05
- Data updated: 2026-08-15
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/calctan/id1445480535/reviews.md

## What is Calctan?

Calctan is a sophisticated calculator app designed for iOS devices (iPhone and iPad), celebrated for its elegant, minimalist design and robust functionality that surpasses traditional calculators. Tailored for students, professionals in mathematics, physics, engineering, and anyone seeking a highly customizable and intuitive calculation tool, Calctan combines advanced mathematical capabilities with a seamless user experience. Its sleek interface and extensive personalization options make it both a practical tool and a visually appealing addition to your device.

The app’s commitment to user-centric design is evident in its seamless integration with iOS ecosystems. With iCloud sync, your calculations and preferences are always up-to-date, whether you’re switching between devices or collaborating on the go. Features like Split Screen and Swipe Mode empower iPad users to maximize productivity, while the ability to share calculations fosters effortless communication. Calctan is more than a calculator—it’s a dynamic, adaptable tool that elevates your calculation experience with style, precision, and efficiency.

Key Features:

1.	Intuitive Design: Calctan’s clean, minimalistic interface prioritizes usability, presenting essential calculator elements in a clear, distraction-free layout that ensures effortless navigation and operation.
2.	Personalized Interface: Choose from 100 pre-installed themes or craft a unique look with a custom color picker. Fine-tune button corner radius, spacing, and layout to optimize comfort and readability, allowing the app to reflect your personal style.
3.	Advanced Math: Access 47 powerful functions, including trigonometric operations (sine, cosine, tangent, and their inverses), percentages for budgeting, exponents, logarithms (base-10, natural, base-2), and roots (square, cube). Switch between degrees and radians, compute factorials for permutations, or use absolute values and reciprocals—perfect for scientific, technical, and financial calculations.
4.	Calculation History: Automatically saves and organizes your calculations, enabling you to revisit, edit, or reuse past results with ease, streamlining complex workflows.
5.	iCloud Sync: Seamlessly syncs calculations and customizations across your iPhone and iPad, ensuring a consistent and cohesive experience across all your devices.
6.	Multitasking Modes:
-	Split Screen Mode: On iPad, use Calctan alongside another app, such as performing calculations while referencing a document or spreadsheet.
-	Swipe Mode: Access a second app at the bottom of the screen while keeping Calctan active at the top, enhancing productivity for multitasking users.
7.	Share Calculations: Share results effortlessly via email, text, or other apps, making collaboration and communication quick and convenient.

Additional Highlights:

•	Library of basic mathematical constants
•	Random color theme generator for creative inspiration
•	Engaging sounds and animations for a dynamic user experience
•	Adjustable decimal places, currency symbols, and thousands separators
•	Dark Mode support for comfortable use in low-light environments
•	Comprehensive settings menu for full control over app preferences
•	Detailed user manual for easy onboarding and reference

## Key features

- Intuitive minimalist design
- 100+ customizable themes
- 47 advanced mathematical functions
- Automatic calculation history
- iCloud sync across devices
- Split Screen and Swipe Mode multitasking
- Share calculations easily

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| No Ads | $9.99 | one-time |


## Recent user reviews (7 of 7)

All indexed reviews: https://appshunter.io/ios/app/calctan/id1445480535/reviews.md

### 1/5 — Crashes and…

*2024-09-02*

… also has adverts and apparently no pay option to avoid them. I deleted and re-installed the app 3 times, but each time it either crashed outright or simply didn’t work right. And I couldn’t find the “box” to change color / theme using hex code (even though the app creates a folder in icloud drive with 100+ color / theme choices. I gave it a good try because I liked the idea of different themes and colors. But I finally had to let it go.

### 1/5 — 役に立たない

*2024-08-13*

相性か何か知らないけど、全く起動できない
使えないから評価も出来ない

### 1/5 — Crashes and…

*2024-08-01*

… also has adverts and apparently no pay option to avoid them. 

I deleted and re-installed the app 3 times, but each time it either crashed outright or simply didn’t work right. And I couldn’t find the “box” to change color / theme using hex code (even though the app creates a folder in icloud drive with 100+ color / theme choices.

I gave it a good try because I liked the idea of different themes and colors. But I finally had to let it go.

### 1/5 — Crashes at launch

*2024-06-14*

App will not open on iOS or iPadOS, force quits immediately upon launch. It has been like this for months. Deleting.

### 1/5 — Crashes upon opening app

*2023-12-04*

Title

### 5/5 — 音效不错

*2023-09-10*

加个括号和历史记录就好了

### 4/5 — I Hate Ad

*2022-06-02, version 2.1.0*

If the app doesn't has any Ad banner, it would be perfect.

## Frequently asked questions about Calctan

### What makes Calctan different from a standard calculator?

Calctan offers a sophisticated, minimalist design with over 47 advanced mathematical functions, far exceeding the capabilities of traditional calculators. It also provides extensive customization options and seamless iCloud sync.

### Can I use Calctan on multiple Apple devices?

Yes, Calctan supports iCloud sync, allowing you to seamlessly sync your calculations and customizations across your iPhone and iPad. This ensures a consistent experience no matter which device you are using.

### How many themes are available in Calctan?

Calctan offers a library of 100 pre-installed themes to personalize your experience. Additionally, you can craft a unique look using a custom color picker and fine-tune interface elements like button corner radius and spacing.

### What advanced math functions does Calctan include?

Calctan includes 47 powerful functions such as trigonometric operations (sine, cosine, tangent), percentages, exponents, logarithms (base-10, natural, base-2), and roots. It also supports switching between degrees and radians.

### Does Calctan have ads?

Yes, Calctan contains advertisements. As a free app with in-app purchases, advertisements are part of the user experience.

### Is Calctan suitable for younger users?

Calctan has an age rating of 4+, making it suitable for a wide range of users. Its intuitive design and basic functions are accessible, while advanced features cater to older students and professionals.

### How often is Calctan updated?

The latest version of Calctan is 2.9.0, last updated on June 30, 2025. Updates typically bring new features, bug fixes, and performance improvements.

### What are the multitasking features for iPad users?

iPad users can leverage Split Screen Mode to use Calctan alongside another app, such as a document or spreadsheet. Swipe Mode allows access to a second app at the bottom of the screen while keeping Calctan active at the top.

## Version history (last 5 releases)

### 2.9.0 — 2025-06-30

•	Bug fixes and technical improvements

### 2.8.0 — 2025-03-18

•	Bug fixes and technical improvements

### 2.7.0 — 2024-02-20

• Bug fixes and technical improvements

### 2.6.0 — 2023-09-17

• Bug fixes and technical improvements

### 2.5.0 — 2023-05-27

• Bug fixes and technical improvements

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## More apps by Jorge Lozada

- [iDousyn](https://appshunter.io/ios/app/idousyn/id421852860)
- [iDousyn Lite](https://appshunter.io/ios/app/idousyn-lite/id992557221)

All apps by Jorge Lozada: https://appshunter.io/developer/421852863

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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 2026-08-15.*