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Products that do what DruckZugPro does
Check if your chimney fits your stove. Free, instant.
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Hi! I built an interactive recipe builder (particularly for dough recipes). I bake a fair amount of bread and use it, along with the more primitive version on my personal blog, to simplify dough calculations. A friend urged me to share it with HN, so here it is. https://teig.pro Some technical details which may be interesting to this audience: - The recipes, apart from a handful of hard coded examples, are fully encoded in query parameters. This comes with problems (like a browser-specific character limit), but in the context of a recipe I consider these edge cases. - The body…
2023 · teig.pro
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Hi HN, I built Firenum because most FIRE calculators I found were either too simplistic or required uploading my entire financial life to a third-party server. I wanted a comprehensive suite that could model more than just the 4% rule. This tool handles Coast, Lean, Fat, and Barista FIRE, but more importantly, it lets you model 'what-if' scenarios like market crashes or major life events to see how they impact your timeline. Key features: -> Privacy-First: No signup required. All calculations and data persistence happen in your local storage. Nothing is sent to a backend. -> Scenario…
Feb 2026 · firenum.com
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2020 · breadfriend.com
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The calculator quickly shows you how long your nest egg will last, given a constant withdrawal. It automatically shows you a safe withdrawal rule to have your capital last forever.
2024 · myfire.app
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I've worked on several projects writing and implementing specifications (particularly CLN): I've found the specs I write are much better when I quote them in the implementation, so I can see what implementers need to know. Also, when specs change in development, it's almost trivial to find where to update the code. This project is a formalization of my various hacky scripts which ensure the requirements are accurately quoted, and give coverage if any are missing. Not a major Opus, but I hope someone else finds it useful!
Jul 2026 · greatspectations.org
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We're building Merlin to speed up electrical component selection, starting with ceramic capacitors. Overview video: https://youtu.be/FrGrivAKhnc The problem: We hated the tedious work of choosing components: copying specs into spreadsheets, taking screenshots from multiple datasheets, and cross-referencing parameters across manufacturers. What we built: - A comparison tool that displays all relevant electrical/mechanical specs along with the performance curves in a single view - An alternates tool that identifies equivalent parts based on a reference component We think…
Nov 2025 · get-merlin.com
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I built TraceAIO, an open-source tool that prompts LLMs on your behalf and tells you whether ChatGPT, Perplexity, and Gemini mention your brand — and which competitors and sources show up instead. Yeah, this category smells a bit like a grift, same as early SEO. And I think over time it will become just SEO again, and become about good content. The tool just helps you monitor over time. It queries the browser products through real browser sessions, not APIs, runs on Docker, with an MCP server so you can query your own data through an LLM. No business model, Apache 2.0, self hosted. If you…
Jun 2026 · traceaio.org
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Hey HN, I build "How Loud Is My Hotel?" as a simple way to check for possible loud noise near a hotel (or any other address) before booking it. I've had some negative experiences in the past so this automatically checks for things like nearby Clubs, Police Stations with sirens, big roads, railroads etc. and gives you a "noise score" based on them. It's free, works worldwide and needs no account. It estimates outside noise risk rather than measuring decibels, so building insulation and temporary noise aren’t included.
Jun 2026 · noise.vantezzen.io
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2023 · sodcalculator.com
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We just released a new weather website using all sorts of awesome web technologies. We use ModestMaps to show tiled, animated radar and satellite data, Raphael.js to show historical averages and record high/lows, and MapQuest's new Nominatim service sitting on top of OpenStreetMap to do location lookups. We're really proud of this site and would love to hear your feedback and to have try it out: http://preview.my-cast.com/
2011
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I brew coffee and I buy a lot of beans. I’m also a lazy person that doesn’t want to type in all the details in one of the available apps and track things to the grams. Luckily I found out that GPT-4o (free tier) is good enough to take a few photos I uploaded of a bag and parse it’s roaster, varietal, origin, tasting notes, roast date, etc. I tried with a dozen different bags and it works pretty well - even when it makes mistakes I can correct them with natural language conversation, which I enjoyed. Then I had to figure out storage. I don’t want to rely on the chat history / context as…
2024
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Threw this little application together today. It uses the OpenAI API to help you figure out what you want to cook next! Please note that the OpenAI API response times are really slow - sorry about that! If someone has suggestions on how I can improve the prompt response time, please share!
2023 · mehungry.app
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Most retirement calculators either oversimplify things or ask you to link your accounts so they can make money off your data. I wanted something that actually helped me see if I was on track without handing over a bank login, so I built RetireNumber. It's a privacy-first retirement planner. You type in your own numbers. No account linking, no selling your data, no VC. Just me and a subscription. The engine does real math: Monte Carlo with 1,000 runs, historical backtesting to 1928 using Shiller's Yale data, tax-aware withdrawal strategies, and scenario comparison so you can try different…
Feb 2026 · retirenumber.com
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This dashboard is a personal project I've developed to visualize every wind farm's energy production across Ireland. I'm trying to break into software development/data analytics sector and I wanted to build a project to practice my coding. I wanted to build a novel project rather than following along to a basic YouTube video project and not really learn anything. I'm interested in the renewable energy sector and after browsing the web noticed there isn't any public data on real time wind energy production in Ireland. I took the task onto myself to attempt to build a dashboard that…
2024 · irelandwinddashboard.com
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