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:

- 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.
• 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.
• 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.

What's New

Version 1.9.4

• Support for the new iPhone X.
• The currency exchange rates are now updated from the European Central Bank.
• Reciprocals 1/x added to the units mode.

Customer Reviews

4.6 out of 5

25 Ratings

25 Ratings

Best calculator app!


I was looking for a simple fractional calculator app and came across this one and love it. The interface is very similar to TI or Casio scientific calculators so it's very easy to figure out how to use it. I was lamenting that it didn't have a bin/hex calculator but one day I accidentally swiped right and discovered the other calculators. I'm really impressed with the quality of this app, especially since it's free.

Man I Love Thomas' Calcs!!!


I used his calcs 3-4 years ago on the palm platform and I'm soo excited that he put them on the iPhone now. I used his calculators more than anyother app on the palm and I know I'll be using this just the same. The only thing I wish he'd fix though (I only do this as a test and serves no practical purposes) is that the calculator would allow for the computation for higher value factorials. On his older calcs on the palm the highest value factorial I could compute was 170! but on this one the highest I could compute is 69!. Thomas can you fix this? Other wise whether your just a everyday user or a math guru this one calc will suite all your needs!!!

Great re-imagining of a classic


The app harkens back to the heyday of pocket scientific calculators of the 70s and 80s, except on steroids. The in-app manual is wonderful and can be viewed side by side with the calc on an iPad, which is a really nice touch. The functions are comprehensive and UI is just right, though I'd like to see a bit of customization in terms of display font size and colors. I don't have an Apple watch yet, but the tie in for that looks pretty cool. Glad to see this app being nicely updated.


Thomas Oellinger
11.8 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, German
Age Rating
Rated 4+
© 2009 - 2017 Thomas Oellinger


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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