iPhone Screenshots


Lightweight Optimized HP Style Reverse Polish Notation(RPN) Calculator.


- Optimized Key Layout
- Big Enter and Zero Key
- No Triangle Functions or 2nd Function key.
- Conditional DUP/DROP key(Enter/Backspace)
- Conditional E/E- key(Period)
- Right hand optimized design
- Paste from clipboard
- Copy to clipboard(Tap stack)

Additional features from lite version.

- Inverting layout for left hand using(Optional)
- Stack Label(Optional)
- Auto Sum(Optional)
- Shake to Reset(Optional)
- Auto Copy to Clipboard(Optional)

Infinity Stack

- Deep stack without limitation except memory capacity.
- Stateless Design, Reset all condition when launching.

Responsive Touch

- Simple UI response is quicker than rich UI or HP emulators.
- Click sound (2 pattern,numbers or others)

What’s New

Version 1.5.0

Bugfix: (Number & Unary Operation) -> X disappear

App Privacy

The developer, Kanasyscom, Inc., has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

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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