# SFX Calc Premium — Scientific Calculator

> Advanced scientific calculator with extensive mathematical and memory functions. (iPhone/iPad app by Wai Kwong Lee.)

- Source: https://appshunter.io/ios/app/sfx-calc-premium/id1573567879 (this page in markdown: same URL + `.md`)
- Developer: [Wai Kwong Lee](https://appshunter.io/developer/1548427960)
- Category: Utilities, Productivity
- Price: $5.99
- Rating: 5.00/5 from 2 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.0 · 16 MB
- Languages: American English
- Released: 2021-06-24
- Data updated: 2026-08-20
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/sfx-calc-premium/id1573567879/reviews.md

## What is SFX Calc Premium?

SFX Calc Premium is the ads-free and no review pop-up version of SFX Calc: A 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 operations
- Constant and volatile memory storage
- Fraction and percentage calculations
- Linear regression and statistics
- Number base conversions (Binary, Octal, Decimal, Hexadecimal)
- Trigonometric, hyperbolic, and logarithmic functions
- Formula calculations

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/sfx-calc-premium/id1573567879/reviews.md

### 5/5 — Diesen Rechner gibt es von Casio Zeit 1985

*2025-07-01, version 6.4*

Dieser Rechner war als fx-5000 bekannt 

und war mit fx-850 fx-8000 und PB-1000 die Mathe / Physik Sensation für Studenten bis hin zum Professoren und geeignet für schnelle professionelle Gleichungen inclusive 
der Basic Prog. Sprache sowie Assembler 
——- lange Rede kurzer Sinn ——-

KI Robotic —— Casio sollte diese niemals
                           Sterben lassen, solange es
                           Computer und Taschen
                           Rechner und Pockets gibt

### 5/5 — Ara

*2024-07-21*

Very happy user of the app. This app arguably the best scientific calculator app on the store. Developer is very responsive too. I requested a minor UI change and it was implemented within one day. I would highly recommend this app.

### 5/5 — Great calculator for engineering

*2023-01-29, version 4.4*

Great calculator for engineering. I would like to see 7 segment numbers too.

### 5/5 — Classic scientific calculator

*2022-10-13*

Love the interface, which is clear, classic calculator graphic and layout.  It also gives positive feedback when you tap a key.  All this makes it fast and easy to use - what more could you want?  The trig functions all give accurate calculations (unlike another calculator app I had downloaded).  it is also good value to remove the ads.  Nice app!

## Frequently asked questions about SFX Calc Premium

### What makes SFX Calc Premium different from other calculators?

SFX Calc Premium is the ads-free and no review pop-up version of SFX Calc. It offers a comprehensive set of scientific and engineering functions without interruptions, providing a cleaner user experience.

### What types of calculations can SFX Calc Premium perform?

It handles basic arithmetic, calculations with constants and memory storage, fractions, percentages, linear regression, statistics, number base conversions, and advanced functions like trigonometric, hyperbolic, and logarithmic operations.

### Does SFX Calc Premium have ads?

No, SFX Calc Premium is explicitly designed to be an ads-free experience. This ensures uninterrupted use for complex calculations.

### What is the price of SFX Calc Premium?

SFX Calc Premium is available for a one-time purchase of $5.99. This grants you access to all its features without any recurring fees.

### On which devices can I use SFX Calc Premium?

SFX Calc Premium is compatible with Mac, iPhone, iPad, and iPod. This broad platform support allows you to use it across your Apple devices.

### How often is SFX Calc Premium updated?

The app was last updated on January 19, 2026, indicating a commitment to maintenance and potential future improvements. The latest version is 6.6.

### What is the user sentiment for SFX Calc Premium?

Based on the available data, SFX Calc Premium has a perfect rating of 5.0 stars from 2 ratings, suggesting a very positive user reception.

### Is SFX Calc Premium suitable for younger users?

SFX Calc Premium has an age rating of 4+, making it appropriate for a wide range of users, including students and professionals.

## 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

### 6.1 — 2025-05-20

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

### 6.0 — 2025-02-18

Improve user experience in engineering mode

## Apps similar to SFX Calc Premium

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| --- | --- | --- | --- |
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## More apps by Wai Kwong Lee

- [SFX Calc](https://appshunter.io/ios/app/sfx-calc/id1548427958)

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

## Related topics

[sfx calc premium](https://appshunter.io/ios/topics/sfx-calc-premium) · [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 2026-08-20.*