Name: Math Calculator
Rating: 3.6 (11 reviews)
Author: csekri

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.