Numbers and Functions f/ Watch

Adds a wearable RPN (reverse notation) calculator to your watch.

Functions supported include basic math, square root, power, log, trigonometry etc.

Supports various numbers styles (regular floating point, scientific notation, engineering notation).

Tap the display to open settings (to change number style, number of fractional digits shown, unit for trigonometry/angles etc.)

This calculator uses reverse notation: enter the operands first, then select the operation. Operands are pushed on a stack and removed when applying an operation. Results are pushed back on the stack, ready for the next operation.