Calcish

Calcish is a Mac app combining a programmable calculator, an enhanced QuickJS engine, an editable notebook and chat with local or remote AI models, all reachable from a global hotkey scratchpad.

Calcish is a macOS application that merges four tools that normally live apart: a calculator, a JavaScript runtime, an AI chat client and a notebook for keeping your work. The calculator handles complex expressions, scientific notation, decimals, fractions, vectors, matrices and big numbers, so it covers ordinary arithmetic and the heavier symbolic and numerical work a student or analyst runs into. The engine underneath is QuickJS, extended with arbitrary-precision integers and decimals plus native support for fractions, vectors and matrices. That extension matters: calculations that stall or lose precision in a browser console or a Node REPL are routine here. Built-in functions reach into calculus, statistics and physics, and the notebook gives every result a formatted home. Cells can hold code, text, files and AI prompts in any mix, and they can be edited, reordered by drag and re-run with one click. Output arrives as tables, plots or formatted text, and notebooks export to Markdown, JavaScript or PDF. The AI layer is where Calcish separates from a plain computational notebook. An AI cell can draft code, summarize findings, explain a calculation or help debug. Users pick their models: local options such as Llama 2 7B-Chat, OpenChat Mistral, Neural Chat 7B and TinyLlama run offline and keep everything on the machine, while remote access covers OpenAI, Google Gemini, OpenRouter, DeepSeek and TextSynth models through the user's own API key. Day to day, the global hotkey is the hook. It summons a floating scratchpad above other apps for quick sums or idea capture, similar to Spotlight but with a JavaScript engine attached. Anyone weighing alternatives will compare it to Jupyter and Obsidian style note tools, and Calcish trades their ecosystem breadth for speed, offline AI and a single window. It suits developers prototyping snippets, students working through problem sets, and analysts who want calculations, code and AI conversation on one page. Pricing is not stated on the homepage; the app is distributed through the Mac App Store.