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Calc 3 - The simple, elegant RPN and Scientific Calculator

By SkyPaw Co. Ltd

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Calc 3 is the most powerful and elegant calculator in the market. Its functions are easy to use, its design is friendly for everyone and it is made to serve plenty of calculations in daily life. Additionally the feature-rich and powerful capabilities also make it ideal for scientists, engineers and students.


+ Natural Expression or Formula (NAT): expressions are input in the natural order as written in the textbooks
+ Immediate Execution (IE): calculations are executed after each key press, similar to various popular calculators, such as: Windows system calculator, Mac system calculator, several basic models of Casio calculators, etc.
+ Reversed Polish Notation (RPN)

- CARET: tap anywhere on the input display to put the caret at that position, drag it to move it around, swipe left/right to back/forward-delete. This unique feature is extremely useful for typing long expressions and quick typos fix without re-entering the whole input again.

- POWERFUL CALCULATION ENGINE: supports computing very large and small numbers. If you don't believe, try it yourself with the following expressions in your computer or personal calculator, to see if they can compute 1000! or 2^(-1000)

- Beautiful and super easy-to-use interface with exciting animation and sound effects

- Supports 3 types of output display, including: FIXED, NORMAL, SCIENTIFIC

- Supports 3 types of angle measurements: DEGREE, RADIAN, GRADIAN

- HISTORY LOG TAPE: in addition to saving a log of every calculation, this feature is also useful for re-using the expressions and results, and exporting them via email

- FORMULA VIEWER: helps you see equations exactly like in the textbooks. This is extremely helpful to verify a long and complex equation

- FUNCTION QUICK VIEW: some functions such as integral or derivative take several arguments and require a strict order, hence they are hard to remember. Just tap & hold on that function button to open up a quick view showing a description and an example. No more learning, remembering and mistakes.

- COPY & PASTE: helps you bring numbers back and forth between Calctimate and other apps, such as note or documents

- More than 50 popular and advanced functions, categorized into four modules: Basic, Trigonometry, Advanced Functions and Constants:

+ BASIC: square, cub, y-th power, percentage, factorial, logarithm base 10-e-2, reciprocal, engineering exponent, square root, cube root, y-th root, modulo, absolute, power of 10-e-2, round, random

+ TRIGONOMETRY: sine, reverse sine, cosine, reverse cosine, tangent, reverse tangent, cosecant, reverse cosecant, secant, reverse secant, hyperbolic sine, reverse hyperbolic sine, hyperbolic cosine, reverse hyperbolic cosine, hyperbolic tangent, reverse hyperbolic tangent

+ ADVANCED FUNCTIONS: derivative, integral, evaluation, root finder, product, sum, fibonacci, permutation, combination, greatest common divisor, least common multiple

+ CONSTANTS: hundreds of popular constants used in Mathematics, Physics and Chemistry

- Other features:

+ Universal binary, download once and run all on iPod touch, iPhone, iPhone5 and iPad

+ Retinal display, beautiful graphics on iPhone 4/4S/5/5S and retina iPad

+ iPhone 5 layout support.

+ Set of beautiful background to choose from.

What's New in Version 3.1.0

- Changed the app name
- Removed banner ad for iPad
- Added interstitial ads
- Fixed several minor bugs and optimized many functions


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Customer Reviews

Finally jumped ship

There was a time I preferred this app over all. I have been a loyal user since the first time the developer added this to the store.

I finally just gave up. Developer said a fix to this latest update is coming but I couldn't wait anymore. I bought TapBots no calcbot app and I absolutely love it!! I hate the landscape mode for the scientific calculator but at least the app works flawlessly.

I say make the switch. I think this developer has given up.

Thanks for the many years of a goof app. I was said to leave but greener grass lies on the other side of the fence.

What a horrible update.

Seriously...? This release is so broken it is hard to believe it was released. Like the others... it is no longer working.

Now another problem we all have is to refrain from updating (after restoring the old version from a backup).

Not working

What's so Hard about recompiling this to work with iOS 8? Paying customers is not enough to motivate this developer to spend an hour making this work. At least take it off the market so people are not conned into buying a broken app.

Calc 3 - The simple, elegant RPN and Scientific Calculator
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This app is designed for both iPhone and iPad
  • Free
  • Category: Utilities
  • Updated:
  • Version: 3.1.0
  • Size: 18.2 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 5.1.1 or later. Compatible with iPhone, iPad, and iPod touch.

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