# Calculator SC-323PU — Scientific Calculator

> Multi-functional scientific calculator with unit conversion and logic modes. (iPhone/iPad app by Thomas Öllinger.)

- Source: https://appshunter.io/ios/app/calculator-sc-323pu/id301290196 (this page in markdown: same URL + `.md`)
- Developer: [Thomas Öllinger](https://appshunter.io/developer/301290199)
- Category: Utilities, Education
- Price: $3.99
- Rating: 4.70/5 from 118 App Store ratings · 94 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 15 MB
- Languages: American English, German (Germany)
- Released: 2009-07-11
- Data updated: 2026-09-07
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/calculator-sc-323pu/id301290196/reviews.md

## What is Calculator SC?

The SC-323PU is a multi functional calculator. It is designed in a way, that it simulates the visual and operational aspects of a true pocket calculator, such that the user will be immediately familiar with its interface. A complete operation manual is included within the App.

The SC-323PU offers the following calculator modes for different tasks:

- SCIENTIFIC CALCULATOR
- UNIT CONVERTER and UNIT CALCULATOR
- LOGIC CALCULATOR (n-base conversion)

• Full operating instructions are included in the App (visible when device is in landscape orientation).
• All modes share the same memory contents, and calculation value, so that the different calculator modes can be used in one calculation task.
• Pasteboard support (copy and paste)
• Algebraic logic for calculation entry.
• Priority of calculations according to a given mathematical formula.
• 30 levels of parentheses or pending operations.
• Variables and memories to store values and use in calculations.
• Floating decimal point calculations with 20 digits mantissa and 2 digits exponent.
• Calculations: Four arithmetic calculations, constant calculation, memory calculations, trigonometric and inverse trigonometric functions, hyperbolic and inverse hyperbolic functions, conversion of angles and time, reciprocals, square roots and cubic roots, X-th roots of Y, squares and powers, logarithmic and exponential functions, factorials, permutations, combinations, conversions of coordinates.
• AER (Algebraic Expression Reserve)  for repetitive calculations of expressions and formulas.
• Complex number calculations.
• Different display modes selectable: floating point decimal, fixed point decimal, scientific notation and engineering notation.
• DEG/RAD/GRAD selector key.
• Fraction calculations.
• Time calculations.
• Frame rate calculations.
• 47 physical constants.
• Unit converter and currency converter.
• Calculations with mixed units.
• The calculator is shipped with 84 physical units and 16 SI prefixes predefined.
• Exchange rate of currency units will be updated automatically from internet.
• Additional units can be defined by user.
• Single and two lines view modes optimized for different conversion tasks.
• Conversions between 4 base systems HEX, DEC, OCT, BIN.
• Boolean operations AND, OR, XOR, NOT, bit shift operations.
• Conversion from “little endian” to “big endian” format and vice versa.
• Handling of 8, 16, 32 and 64 bit signed and unsigned numbers including overflow calculations.


Also on your Apple Watch! You can do basic calculations, tip calculations, unit and currency conversions and even scientific calculations directly on your wrist. Designed with large keys for best usability on the small screen.

## Key features

- Scientific calculator mode
- Unit converter and calculator
- Logic calculator (n-base conversion)
- Algebraic logic and calculation priority
- Variables and memories
- Complex number calculations
- Unit and currency converter

## Recent user reviews (10 of 94)

All indexed reviews: https://appshunter.io/ios/app/calculator-sc-323pu/id301290196/reviews.md

### 5/5 — Perfekt, Besseres habe ich nicht gefunden!

*2026-08-01*

Natürlich geht dieser Rechner weit über meine Fähigkeiten hinaus. Wichtig für mich ist aber:
Anzeige der Rechenschritte zur nachträglichen Kontrolle, schnelles Hin- und Herwechseln zur Bedienungsanleitung, völlig werbungsfrei!

### 1/5 — No

*2026-05-09, version 1.11.8*

Nothing

### 5/5 — Für mich die beste Taschenrechner-App

*2025-03-23*

Aktualisierung meiner früheren Bewertungen:
Nach rund einem Dutzend Versuchen mit anderen Taschenrechner-Apps bin ich vor mittlerweile zehn Jahren auf diese gestoßen. Ich kenne schon die Vorgänger für Palm OS, die ich seinerzeit viel genutzt habe.
Der wissenschaftliche Rechner kopiert den bewährten Aufbau klassischer Taschenrechner der 80er Jahre. Alternativ gibt es D.A.L.-, Einheiten- und Logik-Rechner, sowie ein integriertes Handbuch und eine Watch-App. Außerdem wird die App kontinuierlich gepflegt.
Ich benutze tatsächlich keine andere Rechner-App mehr.

### 3/5 — Ganz gut

*2024-06-02*

Das Komma hinter jeder Zahl nervt. Was soll das? Sonst gut.

### 3/5 — Deg/Rad Mode Switching Bug - Incorrect Angle Unit Display

*2024-02-26*

I'm experiencing an issue with the scientific calculator app where it's giving me the same result for the inverse tangent function (tan^-1(63/200)) regardless of whether it's set to radians (RAD) or degrees (DEG). 

The app shows 0.315 in both RAD and DEG modes, whereas I would expect it to display the result in radians when in RAD mode and convert it to degrees when in DEG mode, which should be approximately 17.48 degrees. 

It seems like there could be a bug with the mode switching or the unit display functionality.

Hopefully this gets fixed as hard to trust otherwise. 

Nice to have history displayed an BEDMAS works correctly.

### 5/5 — Toller Taschenrechner

*2024-01-21, version 1.11.3*

Der Rechner bietet einen sehr großen Funktionsumfang, läuft auf MacOS und iOS, und erleichtert den Einstieg mit einer sehr ausführlichen Bedienungsanleitung. Dabei kostet er nicht viel. Sehr empfehlenswert!

### 5/5 — Bester Taschenrechner

*2023-10-09, version 1.11.3*

Funktioniert wie der alte Casio in der Schule. Und wir regelmäßig von Hr. Öllinger auf das aktuelle MacOS upgedated. Toll! Besser geht der Support nicht!

### 5/5 — Up Date

*2022-09-09, version 1.11.1*

I submitted a review 3 years ago  and at that time I mentioned I had been using this App for two years. So now I have a total of five years expirence    . 
So I have been so happy with this application and author. I still use the app each day and It works perfectly. 

Remember it has full instructions that pop up whenever you turn the iPhone to landscape view. 

This is a super super calculator application. I recommend it to anyone studying math, working as an engineer or chemist, working in finance, working or studying computers. Or just about anybody that can use a full featured calculator.

Try it and you’ll like it.

### 5/5 — Viel zu kostengünstig!

*2022-08-10*

Sehr gut

### 1/5 — Confused

*2022-04-04, version 1.10*

How do you get the scientific functions onto the Apple watch? I only bought the app for that

## Frequently asked questions about Calculator SC

### What does the SC-323PU app do?

The SC-323PU app is a multi-functional calculator that simulates the look and feel of a physical pocket calculator. It offers scientific, unit conversion, and logic calculation modes, along with a wide array of mathematical functions and physical constants.

### What are the key features of this calculator app?

Key features include scientific calculations, unit and currency conversion, logic calculations with n-base conversion, algebraic logic, support for variables and memories, complex number calculations, and a comprehensive set of mathematical functions.

### How much does the SC-323PU app cost?

Based on the provided information, this application is a paid app. There are no mentions of in-app purchases or a subscription model, indicating a one-time purchase for full access.

### What types of calculations can I perform with this app?

You can perform four arithmetic calculations, constant calculations, memory calculations, trigonometric and hyperbolic functions, angle and time conversions, roots, powers, logarithms, factorials, permutations, combinations, complex numbers, and fraction calculations, among many others.

### Can I use this calculator on my Apple Watch?

Yes, the app is also available on Apple Watch. It allows for basic calculations, tip calculations, unit and currency conversions, and even scientific calculations directly on your wrist, with large keys optimized for the small screen.

## Version history (last 5 releases)

### 1.11.9 — 2026-05-31

• Apple Watch: currencies added or changed on the iPhone are now reliably transferred to the Apple Watch
• The Croatian Kuna (HRK) has been replaced by the Danish Krone (DKK) following Croatia's adoption of the Euro – existing entries are migrated automatically
• Additional bug fixes and improvements

### 1.11.8 — 2026-04-26

Automatic exchange rate updates have been corrected.

### 1.11.7 — 2026-04-12

Fixed crash when opening the constants selection view via [2ndF][CONST].

### 1.11.6 — 2026-02-22

Fixed crash when chaning the text selection.

### 1.11.4 — 2024-06-26

Bug fixed:
• Resetting calculations, variables, memories and settings works again.

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## More apps by Thomas Öllinger

- [nuanco – Home Automation](https://appshunter.io/ios/app/nuanco-home-automation/id1188619058)

All apps by Thomas Öllinger: https://appshunter.io/developer/301290199

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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 2026-09-07.*