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Kalker is a calculator program/website that supports user-defined variables, functions, differentiation, and integration. It runs on Windows, macOS, Linux, Android, and in web browsers (with WebAssembly).

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Website - Try it out here!

<img src="preview.png" width="750">

Features

Installation

Package managers

macOS (Homebrew)

brew install kalker

macOS (MacPorts)

sudo port install kalker (info)

Arch Linux

kalker in the AUR, eg. yay -S kalker

Nix/NixOS

kalker in the nixpkgs repository. The most up to date version is also available as a flake.

NetBSD

pkgin install kalker (from the official repositories)

Binaries

Pre-compiled binaries for Linux, Windows, and macOS (64-bit) are available in the releases page.

Compiling

Minimum rust version: v1.36.0. Make sure you have diffutils gcc make and m4 installed. If you use windows: follow the instructions here (don't forget to install mingw-w64-x86_64-rust in MSYS2).

Cargo

Run cargo install kalker

Manually

  1. Go into the cli directory.
  2. Run cargo build --release
  3. Grab the binary from targets/release

Libraries

There are currently three different libraries related to kalker.

Syntax

A complete reference can be found on the website.

Contributing

kalk and cli (Rust)

After making changes to the kalk library (in kalk/), you can easily try them out by going to the root of the project directory, and doing cargo run. This will start kalker (cli), with the new changes. If you're using Windows, you will need to follow the instructions here, but also make sure to install mingw-w64-x86_64-rust in MSYS2.

All Rust code is expected to be formatted with `rustfmt

web (Svelte, TypeScript, Sass)

Run:

  1. npm install
  2. npm run dev - this will automatically re-compile the project when changes are made

mobile (Android)

Run:

  1. npm install
  2. npm run build
  3. npx cap sync
  4. Build the project using Android Studio, or Gradle directly.