The best Hacker News stories from Show from the past day
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Show HN: Tallyit.co/coparents – Split costs with your baby dady
Hello! I am coparenting... and hated having to ask my baby daddy to pay for my sons clothing, school supplies groceries etc bc I had to add everything up. So I fixed it! I<p>- upload reciepts/bankstatements (no uploads saved)<p>- in description say the kinds of things you want to add up, even some math (like split)<p>- tally adds it up<p>it splits the costs if you add in the word split in the description. perfect for people who need to split costs, like gas, daycare, etc. would love any feedback. totally free! one day i will add a paywall, is daycare is EXPENSIVE.
Show HN: Swimming in Tech Debt
This is the first half of my book, “Swimming in Tech Debt”. It is available at a pre-launch sale price of $0.99 (<a href="https://loufranco.com/tech-debt-book" rel="nofollow">https://loufranco.com/tech-debt-book</a>).<p>I have been working on it since January 2024. It is based on some posts in my blog, but expands on my ideas quite a bit.<p>In September 2024, excerpts appeared in Gergely Orosz’s Pragmatic Engineer newsletter, which helped me get a lot of feedback that expanded the book from my initial idea. This half is about what I expected to do before that —- the rest of the book goes into team and CTO practices.
Show HN: Vapor – A notepad that fades away as you type
Hello HN,<p>I made this simple notepad for writing down whatever comes to mind. The goal is to force you to not get hung up on what you’ve already written. There’s no formatting, you can’t edit what you’ve typed, you can’t select text or move your caret around. There’s no backspace, delete, undo/redo, or paste. You can’t even see any words except the one you’re currently typing, and when you’re done with it, it fades away.<p>The text is all still there, just invisible. You can save everything you’ve written as a .txt if you want, or just empty your thoughts and let them disappear forever.<p>The idea was to encourage myself to do more stream-of-consciousness writing. I tend to edit while I write. This forces me to just keep moving forward, and I’ve found it very helpful so far. I was going to build this into my other writing tool, Drift, but I didn’t think it fit with the idea of the project, so I just made it its own thing. I’m calling it Vapor for now.<p>Enjoy, and let me know what you think!
Show HN: Vapor – A notepad that fades away as you type
Hello HN,<p>I made this simple notepad for writing down whatever comes to mind. The goal is to force you to not get hung up on what you’ve already written. There’s no formatting, you can’t edit what you’ve typed, you can’t select text or move your caret around. There’s no backspace, delete, undo/redo, or paste. You can’t even see any words except the one you’re currently typing, and when you’re done with it, it fades away.<p>The text is all still there, just invisible. You can save everything you’ve written as a .txt if you want, or just empty your thoughts and let them disappear forever.<p>The idea was to encourage myself to do more stream-of-consciousness writing. I tend to edit while I write. This forces me to just keep moving forward, and I’ve found it very helpful so far. I was going to build this into my other writing tool, Drift, but I didn’t think it fit with the idea of the project, so I just made it its own thing. I’m calling it Vapor for now.<p>Enjoy, and let me know what you think!
Show HN: Writing Arabic in English
A phonetic Arabic keyboard I created maps English letters to Arabic sounds, covering emphatic letters, hamza, and diacritics—making it easier for learners and casual users to type Arabic.
Show HN: Writing Arabic in English
A phonetic Arabic keyboard I created maps English letters to Arabic sounds, covering emphatic letters, hamza, and diacritics—making it easier for learners and casual users to type Arabic.
Show HN: Writing Arabic in English
A phonetic Arabic keyboard I created maps English letters to Arabic sounds, covering emphatic letters, hamza, and diacritics—making it easier for learners and casual users to type Arabic.
Show HN: Open-sourcing our text-to-CAD app
Hey HN! I'm Zach from Adam (<a href="https://adam.new/">https://adam.new/</a>). We’re building an AI co-pilot for mechanical CAD software.<p>As part of our broader research, we built a browser-based Text-to-CAD app (<a href="https://news.ycombinator.com/item?id=44182206">https://news.ycombinator.com/item?id=44182206</a>) and are now open sourcing it. This is a React SPA with a Supabase backend.<p>What it does:<p>* Generates parametric 3D models from natural language descriptions, with support for both text prompts and image references<p>* Outputs OpenSCAD code with automatically extracted parameters that surface as interactive sliders for instant dimension tweaking<p>* Exports as .STL or .SCAD<p>Under the hood:<p>* Separate agents for conversation and code generation; simple parameter tweaks bypass AI entirely using deterministic regex-based updates<p>* Runs fully in-browser by compiling OpenSCAD to WebAssembly and integrating Three.js with React Three Fiber for 3D rendering<p>* Supports BOSL, BOSL2, MCAD libraries and custom font support (Geist) for text in models<p>We’ve seen many developers trying to replicate this kind of functionality, so we’re releasing this to give the community a solid foundation to build on.<p>Future improvements:<p>* Expand geometry support - Move beyond CSG primitives to support curved surfaces, fillets, lofts, and constraint-driven modeling through CadQuery/Build123D<p>* Better spatial context - UI for face/edge selection and viewport image integration to give LLMs spatial understanding<p>* Enhanced capabilities - RAG on documentation and integration with more OpenSCAD libraries for features like proper threading<p>You can clone the repo and run it locally! Contributions are welcome, and we’ll keep merging PRs as they come in.
Show HN: Open-sourcing our text-to-CAD app
Hey HN! I'm Zach from Adam (<a href="https://adam.new/">https://adam.new/</a>). We’re building an AI co-pilot for mechanical CAD software.<p>As part of our broader research, we built a browser-based Text-to-CAD app (<a href="https://news.ycombinator.com/item?id=44182206">https://news.ycombinator.com/item?id=44182206</a>) and are now open sourcing it. This is a React SPA with a Supabase backend.<p>What it does:<p>* Generates parametric 3D models from natural language descriptions, with support for both text prompts and image references<p>* Outputs OpenSCAD code with automatically extracted parameters that surface as interactive sliders for instant dimension tweaking<p>* Exports as .STL or .SCAD<p>Under the hood:<p>* Separate agents for conversation and code generation; simple parameter tweaks bypass AI entirely using deterministic regex-based updates<p>* Runs fully in-browser by compiling OpenSCAD to WebAssembly and integrating Three.js with React Three Fiber for 3D rendering<p>* Supports BOSL, BOSL2, MCAD libraries and custom font support (Geist) for text in models<p>We’ve seen many developers trying to replicate this kind of functionality, so we’re releasing this to give the community a solid foundation to build on.<p>Future improvements:<p>* Expand geometry support - Move beyond CSG primitives to support curved surfaces, fillets, lofts, and constraint-driven modeling through CadQuery/Build123D<p>* Better spatial context - UI for face/edge selection and viewport image integration to give LLMs spatial understanding<p>* Enhanced capabilities - RAG on documentation and integration with more OpenSCAD libraries for features like proper threading<p>You can clone the repo and run it locally! Contributions are welcome, and we’ll keep merging PRs as they come in.
Show HN: Open-sourcing our text-to-CAD app
Hey HN! I'm Zach from Adam (<a href="https://adam.new/">https://adam.new/</a>). We’re building an AI co-pilot for mechanical CAD software.<p>As part of our broader research, we built a browser-based Text-to-CAD app (<a href="https://news.ycombinator.com/item?id=44182206">https://news.ycombinator.com/item?id=44182206</a>) and are now open sourcing it. This is a React SPA with a Supabase backend.<p>What it does:<p>* Generates parametric 3D models from natural language descriptions, with support for both text prompts and image references<p>* Outputs OpenSCAD code with automatically extracted parameters that surface as interactive sliders for instant dimension tweaking<p>* Exports as .STL or .SCAD<p>Under the hood:<p>* Separate agents for conversation and code generation; simple parameter tweaks bypass AI entirely using deterministic regex-based updates<p>* Runs fully in-browser by compiling OpenSCAD to WebAssembly and integrating Three.js with React Three Fiber for 3D rendering<p>* Supports BOSL, BOSL2, MCAD libraries and custom font support (Geist) for text in models<p>We’ve seen many developers trying to replicate this kind of functionality, so we’re releasing this to give the community a solid foundation to build on.<p>Future improvements:<p>* Expand geometry support - Move beyond CSG primitives to support curved surfaces, fillets, lofts, and constraint-driven modeling through CadQuery/Build123D<p>* Better spatial context - UI for face/edge selection and viewport image integration to give LLMs spatial understanding<p>* Enhanced capabilities - RAG on documentation and integration with more OpenSCAD libraries for features like proper threading<p>You can clone the repo and run it locally! Contributions are welcome, and we’ll keep merging PRs as they come in.
Show HN: Open-sourcing our text-to-CAD app
Hey HN! I'm Zach from Adam (<a href="https://adam.new/">https://adam.new/</a>). We’re building an AI co-pilot for mechanical CAD software.<p>As part of our broader research, we built a browser-based Text-to-CAD app (<a href="https://news.ycombinator.com/item?id=44182206">https://news.ycombinator.com/item?id=44182206</a>) and are now open sourcing it. This is a React SPA with a Supabase backend.<p>What it does:<p>* Generates parametric 3D models from natural language descriptions, with support for both text prompts and image references<p>* Outputs OpenSCAD code with automatically extracted parameters that surface as interactive sliders for instant dimension tweaking<p>* Exports as .STL or .SCAD<p>Under the hood:<p>* Separate agents for conversation and code generation; simple parameter tweaks bypass AI entirely using deterministic regex-based updates<p>* Runs fully in-browser by compiling OpenSCAD to WebAssembly and integrating Three.js with React Three Fiber for 3D rendering<p>* Supports BOSL, BOSL2, MCAD libraries and custom font support (Geist) for text in models<p>We’ve seen many developers trying to replicate this kind of functionality, so we’re releasing this to give the community a solid foundation to build on.<p>Future improvements:<p>* Expand geometry support - Move beyond CSG primitives to support curved surfaces, fillets, lofts, and constraint-driven modeling through CadQuery/Build123D<p>* Better spatial context - UI for face/edge selection and viewport image integration to give LLMs spatial understanding<p>* Enhanced capabilities - RAG on documentation and integration with more OpenSCAD libraries for features like proper threading<p>You can clone the repo and run it locally! Contributions are welcome, and we’ll keep merging PRs as they come in.
Show HN: Swimming in Tech Debt
This is the first half of my book, “Swimming in Tech Debt”. It is available at a pre-launch sale price of $0.99 (<a href="https://loufranco.com/tech-debt-book" rel="nofollow">https://loufranco.com/tech-debt-book</a>).<p>I have been working on it since January 2024. It is based on some posts in my blog, but expands on my ideas quite a bit.<p>In September 2024, excerpts appeared in Gergely Orosz’s Pragmatic Engineer newsletter, which helped me get a lot of feedback that expanded the book from my initial idea. This half is about what I expected to do before that —- the rest of the book goes into team and CTO practices.
Show HN: Swimming in Tech Debt
This is the first half of my book, “Swimming in Tech Debt”. It is available at a pre-launch sale price of $0.99 (<a href="https://loufranco.com/tech-debt-book" rel="nofollow">https://loufranco.com/tech-debt-book</a>).<p>I have been working on it since January 2024. It is based on some posts in my blog, but expands on my ideas quite a bit.<p>In September 2024, excerpts appeared in Gergely Orosz’s Pragmatic Engineer newsletter, which helped me get a lot of feedback that expanded the book from my initial idea. This half is about what I expected to do before that —- the rest of the book goes into team and CTO practices.
Show HN: Swimming in Tech Debt
This is the first half of my book, “Swimming in Tech Debt”. It is available at a pre-launch sale price of $0.99 (<a href="https://loufranco.com/tech-debt-book" rel="nofollow">https://loufranco.com/tech-debt-book</a>).<p>I have been working on it since January 2024. It is based on some posts in my blog, but expands on my ideas quite a bit.<p>In September 2024, excerpts appeared in Gergely Orosz’s Pragmatic Engineer newsletter, which helped me get a lot of feedback that expanded the book from my initial idea. This half is about what I expected to do before that —- the rest of the book goes into team and CTO practices.
Show HN: Swimming in Tech Debt
This is the first half of my book, “Swimming in Tech Debt”. It is available at a pre-launch sale price of $0.99 (<a href="https://loufranco.com/tech-debt-book" rel="nofollow">https://loufranco.com/tech-debt-book</a>).<p>I have been working on it since January 2024. It is based on some posts in my blog, but expands on my ideas quite a bit.<p>In September 2024, excerpts appeared in Gergely Orosz’s Pragmatic Engineer newsletter, which helped me get a lot of feedback that expanded the book from my initial idea. This half is about what I expected to do before that —- the rest of the book goes into team and CTO practices.
Show HN: Shimmy – 5MB privacy-first, local alternative to Ollama (680MB)
Show HN: I built FlipCards – a flashcard app with variations to improve learning
Hi HN, I’m Felipe, a 9-5 developer aiming to become a full-time indie hacker. I struggled with flashcard apps that focus on decorating cards instead of learning concepts, so I built FlipCards to solve that problem.<p>What it does:
FlipCards lets you:<p>- Create cards for any concept (math, language, coding, etc.)
- Add multiple variations per card – the more variations, the better your understanding
- Study smarter – the algorithm randomly selects variations so you can’t just memorize Q→A patterns<p>Why it’s different:<p>- Most apps use reverse cards (Q→A, A→Q). FlipCards uses variations to reinforce concepts in multiple contexts.
- Powered by the SM2 spaced repetition algorithm, scientifically proven for long-term retention.<p>Pricing:<p>- Free – 1 deck, 3 cards, 1 study session
- Annual – $20/year for unlimited decks and cards
- Lifetime – $50 one-time for unlimited everything<p>I built FlipCards because I kept getting stuck decorating cards in other apps. Now I can create as many variations as I want, and the algorithm mixes them for me.<p>I’d love feedback from the HN community:<p>- Does this approach to flashcards make sense?
- Would you use an app like this for learning?<p>Try it here: <a href="https://flipcardsapp.vercel.app" rel="nofollow">https://flipcardsapp.vercel.app</a><p>Thanks,
Felipe
Show HN: I built FlipCards – a flashcard app with variations to improve learning
Hi HN, I’m Felipe, a 9-5 developer aiming to become a full-time indie hacker. I struggled with flashcard apps that focus on decorating cards instead of learning concepts, so I built FlipCards to solve that problem.<p>What it does:
FlipCards lets you:<p>- Create cards for any concept (math, language, coding, etc.)
- Add multiple variations per card – the more variations, the better your understanding
- Study smarter – the algorithm randomly selects variations so you can’t just memorize Q→A patterns<p>Why it’s different:<p>- Most apps use reverse cards (Q→A, A→Q). FlipCards uses variations to reinforce concepts in multiple contexts.
- Powered by the SM2 spaced repetition algorithm, scientifically proven for long-term retention.<p>Pricing:<p>- Free – 1 deck, 3 cards, 1 study session
- Annual – $20/year for unlimited decks and cards
- Lifetime – $50 one-time for unlimited everything<p>I built FlipCards because I kept getting stuck decorating cards in other apps. Now I can create as many variations as I want, and the algorithm mixes them for me.<p>I’d love feedback from the HN community:<p>- Does this approach to flashcards make sense?
- Would you use an app like this for learning?<p>Try it here: <a href="https://flipcardsapp.vercel.app" rel="nofollow">https://flipcardsapp.vercel.app</a><p>Thanks,
Felipe
Show HN: A Map of All YC Companies (5,300 Startups by Batch and Location)
Show HN: A Map of All YC Companies (5,300 Startups by Batch and Location)