Calcish is an all-in-one tool for macOS users that combines the functionality of a calculator with JavaScript scripting, inbuilt AI features and a notebook-like interface.

It is intended to facilitate quick calculations, execution of scripts, and interaction with local or remote AI models. Designed on QuickJS, it offers enhancements to regular JavaScript, including more accurate calculations with large numbers, fractional calculations, vector and matrix operations for arrays, and decimal number types for exact currency calculations.

Even for beginners in programming or JavaScript, the user-friendly interface and thorough documentation streamline the learning process. Notably, Calcish also contains built-in large language models allowing users to chat with various state-of-the-art AI models or integrate with OpenAI's GPT-4 and GPT-3.5, Cohere, and TextSynth using their respective APIs.

The scratchpad feature in Calcish can be opened over other applications for quick scripting and calculations, with an option to save finished work as a codebook for future reference.