Calculate everywhere on your wrist with a scientific calculator available for both physical button and touchscreen devices.

This full-featured calculator can be useful when shopping, doing math homework, changing currency etc. There are three evaluation modes: Traditional/Postfix/Prefix. An expression can expand into multiple lines.

IMPORTANT: EXIT can be found in the menu (press and hold UP/MENU button)!!!

USAGE ON NON-TOUCHSCREEN DEVICES

• Menu (press and hold up button): access to Exit, switch between Traditional, Prefix and Postfix/RPN modes.
• Back button: access to the math operations, math constants, delete, and clear.
• Start button: add new digit to the last number or add a new number to the expression.
• Up/down button: rotate between digits and decimal point.

USAGE ON TOUCHSCREEN DEVICES

• Swipe up/down: rotate between digits and decimal point.
• Back: usually exits the app (depending on device).
• Tap on the top label (Traditional/Prefix/Postfix): access to Exit, switch between Traditional, Prefix and Postfix modes.
• Tap on letter O: access to the math operations, math constants, delete and clear.
• Tap on letter D: add new digit to the last number or add a new number to the expression.
• Any keypress: delete.

NOTES

Idea for the user interface was taken from https://github.com/rvk/rpncalc.

In Traditional mode log is implemented as a binary function e.g. 2log1024 = 10.

Floating-point calculations are accurate up to 5 decimal places.

On some Edge cycling computers, the design may look odd.

The stack-based RPN is limited to 5 numbers.