Show HN: Fire hazard zone, power line risk and fire history for any CA address https://ift.tt/5hRbAUX

Show HN: Fire hazard zone, power line risk and fire history for any CA address https://ift.tt/t4IMnKN October 22, 2026 at 10:52PM

Show HN: OnKey – I'm a bad singer, so I built an app to show where I'm off-key https://ift.tt/d5x8sFE

Show HN: OnKey – I'm a bad singer, so I built an app to show where I'm off-key I'm not a good singer, but strangely enough I still like singing. I've improved a little over time with singing apps, but their song lists are limited by licensing, so I'd often open a song expecting the original and find a cover I didn't want to sing to. So I built OnKey: a free, open-source (MIT) Mac app that listens to whatever you're playing in Spotify, Apple Music or YouTube, learns the singer's melody, and shows you live where you're sharp or flat, with a score at the end. Nightingale did something similar years ago for your own audio files. OnKey works with the music you already stream. Demo (1:35, sound on): https://singonkey.app The first time you play a song, you can sing along while it listens, or play a whole playlist and let OnKey learn the songs in the background before you come back to sing them. When a song finishes it learns the notes on your Mac (a couple of minutes), and from the second play the notes scroll towards you before you sing them. Learning the song and scoring you both happen on your Mac. No account, no analytics, and the music is never saved or sent anywhere. Your takes stay there too. To check the score means something, I ran 20 recordings of singers, from poor to professional, that music experts had already scored. OnKey ranked them in nearly the same order as the experts did. It's still rough in places: busy mixes and harmonies can confuse which voice is the tune, and now and then a note lands an octave off. Scoring is forgiving on purpose for now, set for beginners like me, so stricter modes for better singers are next. And it's Apple Silicon and macOS 14.2+ only. I'd love to hear where it scores you unfairly or the notes go wrong, and I'm happy to answer questions about how it hears the music and learns a song. https://ift.tt/CP3YbDK October 22, 2026 at 09:04PM

Show HN: Gembop, a block-placement puzzle game in 2D and 3D https://ift.tt/erBcEhM

Show HN: Gembop, a block-placement puzzle game in 2D and 3D https://gembop.games/play October 21, 2026 at 10:04PM

Show HN: ULDA – Client-side encryption with a simple JavaScript API https://ift.tt/DXrnjql

Show HN: ULDA – Client-side encryption with a simple JavaScript API Hi there! We have designed client side encrypted storage that sync on multiple devices and allows to hold that data on your server. We have started as chat application in late 2022 that has completly open-readable database. The idea was simple - server holds zero secrets, like non at all. But we ran into the problem of authentication - there were no auth method what could make quick, synced authorization with completely zero secrets. So in early 2023 we came to an idea of authentication via proof of ownership by providing proof that next step is made by the same user. Now you can see our job as ulda core https://ift.tt/KNeFJsH . Ulda was called as universal liniar data authentication. But a year later we faced that “None need another extremely secure chat application” and we decided to export our ideas and share ulda as a method in order to gather some feedback from some smarter people. In 2025 we tried to publish our white papers at REKS, CMIS and in the end in Journal of Cryptology. Ulda was never published and then we decided that it would probable a good idea to go and publish at least something somewhere to bring some attraction and hopefully some feedback. So, we assembled an sdk, that worked via ulda core and gave developers an ability to work in with encrypted and synced storage directly by editing json. We tried to make is simple as possible. We hope to bring some attention not to a sdk itself, but rather to authentication method itself. You can read our white paper here: https://ift.tt/NfdVuZa Also, if you would like to see our sdk, you can also try it here: https://docs.ulda.io , https://ulda.io . Thank you very much for your time and we hope for your feedback about authentication method. Best regards, Mark Shaposhnik Vitalii Radko https://demo.ulda.io/ October 20, 2026 at 12:16AM

Show HN: Skillsync – Coding agent memory but it's just search https://ift.tt/zO9Efsd

Show HN: Skillsync – Coding agent memory but it's just search I built a claude mod that searches every session (across harnesses) on each prompt. On every prompt, it runs a series of decision models to pick the right sessions + messages and adds anything relevant to the context. Requires no indexing or setup and works out of the box Demo: https://youtu.be/o5vEf8tgus4 https://skillsync.com October 21, 2026 at 12:04AM

Show HN: Agent Archive – Session Handoffs and Backups for Claude Code and Codex https://ift.tt/DFRfCZ0

Show HN: Agent Archive – Session Handoffs and Backups for Claude Code and Codex I often switch between Claude Code and Codex throughout the week, and between my laptop and an older machine I leave running at home. I built agent-archive to make it easier to pick up where I left off, especially when i hit usage limits. It lets you (or a coding agent) find past coding sessions and hand their conversation context to another agent. You can try local handoffs without setup, or connect your own S3/R2 bucket for automatic archiving and access from other machines. It also tracks usage across agents and gives you a full archive of your session transcripts across agents, which I've found useful to iterating and improving my AGENTS.md and lint rules. https://ift.tt/xIyuDJW October 20, 2026 at 10:54PM

Show HN: RawLink – Building a VPN protocol from scratch https://ift.tt/HUEdBin

Show HN: RawLink – Building a VPN protocol from scratch https://ift.tt/9lxEb0N... https://ift.tt/D4z7eZk October 20, 2026 at 01:59AM

Show HN: ECG Signal Processing Starter Kit – Python, SciPy, and FastAPI https://ift.tt/gOBQnSN

Show HN: ECG Signal Processing Starter Kit – Python, SciPy, and FastAPI https://ift.tt/c9eELJd October 19, 2026 at 09:30PM

Show HN: Kramena – Classic books, 20 minutes a day, with spoiler-safe recaps https://ift.tt/HmBPsgA

Show HN: Kramena – Classic books, 20 minutes a day, with spoiler-safe recaps https://ift.tt/ga1rvZn October 18, 2026 at 11:02PM

Show HN: Parin – A 2D game engine between raylib and Godot, written in Dlang https://ift.tt/KZ6w5FU

Show HN: Parin – A 2D game engine between raylib and Godot, written in Dlang https://ift.tt/vIOyRm4 October 16, 2026 at 08:22PM

Show HN: Flying rocket car x Flappy Bird https://ift.tt/gn0MzXV

Show HN: Flying rocket car x Flappy Bird https://ift.tt/6yj5DxW October 18, 2026 at 12:14AM

Show HN: MacVisor Runs VMs with VLANs and Firewall on Apple Silicon https://ift.tt/b1Z9ez2

Show HN: MacVisor Runs VMs with VLANs and Firewall on Apple Silicon https://ift.tt/G3Xctdu October 16, 2026 at 09:46PM

Show HN: Council AI. Spot biases / hallucinations in top AI models https://ift.tt/Wdwuhen

Show HN: Council AI. Spot biases / hallucinations in top AI models Examples: - The best and worst of AI in 2026. https://ift.tt/Wj8AISo - The best and worst of Trump 2026. https://ift.tt/Ku5bDrl https://councilai.app October 15, 2026 at 11:19PM