# SFX Calc — Scientific Calculator

> Free scientific calculator for academic, scientific, and engineering calculations. (iPhone/iPad app by Wai Kwong Lee.)

- Source: https://appshunter.io/ios/app/sfx-calc/id1548427958 (this page in markdown: same URL + `.md`)
- Developer: [Wai Kwong Lee](https://appshunter.io/developer/1548427960)
- Category: Utilities, Productivity
- Price: Free
- Rating: 4.70/5 from 137 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.0 · 20 MB
- Languages: American English
- Released: 2021-01-12
- Data updated: 2026-09-03
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/sfx-calc/id1548427958/reviews.md

## What is SFX Calc?

SFX-Calc is a free calculator app designed for academic, scientific and engineering purpose. The calculator features:

1.   Basic arithmetic calculation: Plus, Minus, Multiply, Divide

2.   Calculation with one operand fixed as constant

3.   Calculation with an non-volatile memory storage

4.   Calculation with 10 volatile memory storage

5.   Fraction and percentage calculation

6.   Linear regression and Statistic calculation

7.   Binary / Octal / Decimal / Hexadecimal calculation

8.   Various functions like Trigonometric, Hyperbolic, Logarithm, Exponential, Power, Root, etc.

9.   UI/UX similar to Casio scientific calculator

10.   Formula calculation including Quadratic formula, Standard Normal Distribution Probability, etc.

## Key features

- Basic arithmetic
- Constant and memory storage
- Fraction and percentage calculation
- Linear regression and statistics
- Number base conversions (Binary, Octal, Decimal, Hexadecimal)
- Advanced mathematical functions
- Formula calculations

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/sfx-calc/id1548427958/reviews.md

### 4/5 — It's ok

*2025-08-30, version 6.4*

The K function is hard to use but apart from that really good app

### 5/5 — Just superb

*2024-06-19, version 4.9*

Really is the best app for this job.
Totally looks and behaves like a Casio (the best calculators)

## Frequently asked questions about SFX Calc

### What kind of calculations can SFX Calc perform?

SFX Calc handles basic arithmetic, calculations with fixed constants, fraction and percentage calculations, linear regression, statistics, and number base conversions (binary, octal, decimal, hexadecimal). It also includes advanced functions like trigonometric, hyperbolic, logarithm, exponential, power, and root functions.

### Is SFX Calc free to use?

Yes, SFX Calc is completely free to download and use. It is supported by advertisements.

### What devices is SFX Calc compatible with?

SFX Calc is available on Mac, iPhone, iPad, and iPod. It is designed to work across Apple's ecosystem.

### How often is SFX Calc updated?

The latest version, 6.6, was last updated on January 19, 2026. While the provided update date is in the future, this indicates ongoing development and support for the application.

### What is the age rating for SFX Calc?

SFX Calc has an age rating of 4+, making it suitable for users of all ages who require its functionality.

### Does SFX Calc have a user interface similar to popular calculators?

Yes, SFX Calc features a UI/UX designed to be similar to the Casio scientific calculator, providing a familiar experience for many users.

### Can SFX Calc perform complex formulas?

Yes, SFX Calc supports formula calculations, including specific ones like the Quadratic formula and Standard Normal Distribution Probability, making it useful for advanced academic and scientific tasks.

### What do users think of SFX Calc?

SFX Calc has a high rating of 4.7 stars from 137 ratings, indicating strong user satisfaction with its features and performance.

## Version history (last 5 releases)

### 6.6 — 2026-01-19

Add UI setting to exchange the position of the display panel and the legend

### 6.4 — 2025-06-22

Add setting to keep mode upon restart the app

### 6.3 — 2025-06-16

Fix the issue of value entry after pressing the engineering notation key followed by the negation key

### 6.2 — 2025-06-15

Fix the UI layout issue when setting Ads at bottom

### 6.1 — 2025-05-20

Fix a display issue in the iPad device when bringing it back from the background or switching back from another app

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## More apps by Wai Kwong Lee

- [SFX Calc Premium](https://appshunter.io/ios/app/sfx-calc-premium/id1573567879)

All apps by Wai Kwong Lee: https://appshunter.io/developer/1548427960

## Related topics

[sfx calc](https://appshunter.io/ios/topics/sfx-calc)

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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 2026-09-03.*