Kwantity

What it does

Units are first-class

Values keep their dimension through a calculation, so `35000 ft to m` and `2000 mAh * 3.7 V` both type-check. Around 90 units across length, mass, time, speed, angle, temperature, pressure, energy, power and electricity.

Programmable, not just configurable

A real little language — variables, if/else, while, for..in, lists, strings and user functions. Anything you define becomes available everywhere, including as a tappable form.

Written for a phone keyboard

Functions can be called without parens or commas: `tod 35000 ft 1500 fpm 450 kt` is the same as the parenthesised form, so a long expression does not become a punctuation exercise.

Built-in help

`help` lists everything by category and `help <name>` explains one function, unit or variable — including your own, picking up the comment written above them.

Units that compose

Multiply or divide any two units and the result names itself: `2 ft * 3 ft` is `6 ft2`, and `180 lb * 85 in` is `15300 lb_in` — a weight-and-balance moment, divisible straight back out to find the arm.

A logbook that totals itself

Add each leg as a duration and the total reads back in H:MM, the form a logbook and a flight plan both want.

Functional where it helps

Anonymous functions and a pipe operator, so `10 kt |> half |> half` reads left to right, and `if/then/else` works as an expression inside one.

Scripts for the jobs people actually have

Twelve bundled, editable script libraries organised as domain › category: flight planning, weight and balance, navigation, logbook, cooking, DIY, finance, health and electronics.

Densities done honestly

A cup is a volume, so `flour(1 cup)` is 125 g while `honey(1 cup)` is 336 g. Density is a real unit, so `flour(500 g)` is refused as a mass-to-volume conversion rather than guessed at.

Built with

• Flutter
• Dart
• iOS
• Android
• Linux desktop
• macOS

Worth knowing

More work