Scientific Reverse Polish Notation Calculator.

Supported functions include square root, reciprocal, change sign, sine, cosine, tangent, arc sine, cosine, tangent, hyperbolic sine, cosine, tangent, and arc hyperbolic sine, cosine, and tangent. Also 10^X, e^X, y^X, X^2, log, natural log, delta percent, pi key, factorial, and nth root keys.

Trigonometric functions also computed in Degrees, Radians, or Gradians.

What’s New

Version 1.99

This app has been updated by Apple to use the latest Apple signing certificate.

Optimized iPad layout
Updated for current iOS
Bug fixes

Ratings and Reviews

4.8 out of 5
6 Ratings

6 Ratings

MylesAngus ,


Love the RPN (Reverse Polish Notation)!

Qwerty review ,

Nice job

Clean interface. Does it's Job well.

SuperLimLLC ,

Pretty good app but buttons are kind of small

It's a pretty good app that works very well. One thing that I don't like about it is that the buttons are pretty small. On the other hand, it's free. You can't expect a Mercedes for a Hyundai price.

App Privacy

The developer, John Cominio, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

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

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