Gauss
Notepad calculator for Mac with units, currencies &dev tools
Gauss launched on March 31, 2026 with 2 votes, #5,166 of 23,380 launches that month.
What it does
Gauss is a notepad-style calculator for macOS. Type math the way you think — with words, units, and currencies — and get instant results on every line. No buttons, no equals sign, no separate conversion apps. 80+ unit conversions, 170+ live currencies, and developer tools like color conversion, base64, and timestamps. 4x cheaper than Numi ($4.99 vs ~$20). 7-day free trial, one-time license.
A free, open-source notepad-style calculator for macOS with natural language input, 80+ unit conversions, 170+ live currencies, and developer tools. Native Swift, MIT licensed.
A notepad-style calculator for macOS — the free, open-source alternative to Numi. Gauss is a notepad-style calculator for macOS. Type math the way you think — with words, units, and currencies — and get instant results on every line. No buttons, no equals sign, no separate conversion apps. Built for developers, designers, and anyone who does quick math throughout the day. Summon it with a hotkey, type your expression, and get back to work. Variables carry across lines, results auto-save, and everything runs locally on your Mac. Gauss is open source and free forever — no trial, no feature gating, no subscription. Type expressions the way you think. Write "20% of 150" or "$45 + tax" and get…from awesomemacapp.com
Does a similar job
all alternatives →
I made a web-based notepad with a built in unit calculator2022 · numpad.io · ▲488I launched NumPad v1 on here a few years ago, and back then it wasn't much more than a thin CodeMirror wrapper around the calculator engine I'd written. Now I've rewritten it as a PWA that supports multiple documents, persists them to IndexedDB, and has a syncing service for paying customers. Syncing is handled by Automerge[1] under the hood, which should make it relatively easy to get document sharing working too. [1] https://automerge.org/
Figr.app – a multi-user, notepad style calculator (desktop app)2022 · figr.app · ▲275Hi all, just posting an update to my previous Show HN, where I announced a side-project I worked on which was a (web version) of a multi-user, notepad style calculator: https://news.ycombinator.com/item?id=31817997 After a couple of user requests (and having a good think about it) I decided to migrate the web UI to create a Mac and Windows desktop app. After using it a little bit, I feel this is a much better experience than the webapp, and reduces a lot of the friction if I wanted to run a few small calculations. You can find the download links below:…



More dev tools this month
the category →

open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.
Dev tools · 28d ago · github.com

Contribute to reladraw/reladraw development by creating an account on GitHub.
Dev tools · 26d ago · github.com
OpenBot▲362Grok Bot alternative: free, local, open-source, multiplayer
Dev tools · 23d ago · openbot.run
Talanoa▲346Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…
Dev tools · 20d ago · talanoa.email
CoreSpeed▲332One MCP for everything your agents need: apps, memory, tools
Dev tools · 28d ago · corespeed.io
Source: Product Hunt launch ↗
Launched alongside, March 2026
the whole month →


Switch from ChatGPT to Claude with import memory feature
AI · Mar 2026 · claude.com
Littlebird▲709Littlebird remembers everything across your meetings, messages, docs, and apps, then takes action so you can recall any detail and never lose context.
AI · Mar 2026 · littlebird.ai

