RPN Calculator DeepStack app for iPhone and iPad

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

Features:

- 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)