Show HN for July 23, 2025

Hey HN,

This is an MCP server to chat with Apple Health data. I built it because I'm working on (yet another) personal trainer tool that keeps track of my workout goals, etc. and does scheduling for me. Part of that is weekly check-ins. I thought pairing those check-ins with sensor data could be useful, so here we are.

It seems there isn't a way to automate access to Apple Health data, so this relies on an iOS app that can quickly/easily export key data to CSV. So the process at the moment is to export the data every Sunday before doing a check-in. More steps than I'd like, but in practice isn't a big lift.

Under the hood this is mostly a thin wrapper around duckdb.

There's a video of it in action here: https://x.com/realtron/status/1947710791521591514

Hi HN,

I spent the past year building this in my spare time because I got tired of enterprise security tools that cost $50K/year and don't understand Linux.

TheProtector is a comprehensive security monitoring tool that actually runs on the systems we use (Linux) instead of being a Windows-first afterthought. Built it entirely on a $500 laptop because I believe good security shouldn't require unlimited budgets.

Features: - Real-time process, network, and file monitoring - YARA malware detection with custom rules - eBPF kernel monitoring (when available) - Behavioral baseline establishment and anomaly detection - Active threat response (blocks IPs, kills processes, quarantines files) - Anti-evasion detection for rootkits and advanced threats - Honeypots for attack detection - Web dashboard for monitoring - Single bash script, no complex installation

The tagline is "not perfect but better than most" because I'm tired of security vendors claiming their tools are flawless. This actually works, costs $0, and you can read every line of code.

I know bash isn't the sexy choice for security tools, but it runs everywhere, has zero dependencies, and most Linux admins can read/modify it. Sometimes boring technology that works is better than fancy technology that doesn't.

It's designed for the intersection of "paranoid about security" and "don't have enterprise budgets" - which describes most of us actually running Linux systems.

GitHub: https://github.com/IHATEGIVINGAUSERNAME/theProtector

Been running it on my own systems for months. Catches the stuff that matters and doesn't flood you with false positives. If you hate expensive security theater as much as I do, might be worth a look.

Open to feedback, especially from folks who know more about this stuff than I do.

Thanks, IHATEGIVINGAUSERNAME (yes, I really do hate giving usernames)

Hi HN!

I built Bookhead because I used to work as a bookseller and I wasn't happy with the software options when I decided to sell my own collection online (with the hopes of one day growing so I can open my own brick & mortar). So I decided to make my own bookselling app...a classic hacker distraction.

Bookhead has two main parts: 1. an inventory management app that allows a bookseller to list their books anywhere they want to sell books (like Squarespace, Biblio, eBay, Shopify (coming soon!), etc) 2. an e-commerce platform with a CMS for selling books and letting a store control their online brand

I have a very exciting roadmap that I'm not ready to fully reveal, but it's all based on books. I'm building a sorta Zapier-like platform for independent booksellers. Everything is so fragmented and disconnected, which makes it hard for booksellers to do their work. I'm hoping to change that. I have a blog post that lays out my vision here: https://bookhead.net/blog/fragmented/

The current iteration is like "data engineering as a service for books." A book is a powerful thing. I'm hoping to give a bookstore everything they need to sell books online. Inventory, e-commerce, marketing, etc. It's a crowded market but I've had fun making the bookselling app that I believe should exist.

If you know any booksellers, please let them know about this! I'm onboarding my first customer right now and the biggest bottleneck is the other bookselling software providers, despite my intention to collaborate instead of compete. It's frustrating to wait for two weeks for a point of sale provider to setup an integration. It's almost like they don't care about their customers. Some providers even require ethernet cables for their software...still partying like it's 1999. Perfect for early-adopter booksellers frustrated with current tech who understand the power of automation.

I'm currently looking for funding so I can focus on this full-time. My biggest problem right now is time (aka money) because I have to sell my time to make rent etc, and can't focus on this project like I need to. I've gotten good validation from booksellers and other technically savvy folks in the industry (I've heard from two different companies that they've considered building something like this), so I believe I have something valuable. I'm not interested in funding from somebody who doesn't share my love for books or doesn't support my mission: help people use technology to promote literature. I believe that literature is one of humanity’s most prized creations, and we can use technology as a tool to keep this gift alive.

Please email me at [email protected] if you know of booksellers who might want to be an early adopter, or know of any funding opportunities that might be a good fit.

I built a lightweight GIF decoder in pure C, ideal for embedded or performance-critical environments. It’s header-only, zero dynamic memory allocations, and fully platform-independent. Supports both static and animated GIFs, with turbo and safe decoding modes. Works great on microcontrollers, IoT devices, and anything with a framebuffer. Would love feedback or ideas where this could be useful.

Github: https://github.com/Ferki-git-creator/TurboStitchGIF-HeaderOn...

Hi HN,

I’d like to share RcloneView( https://rcloneview.com ), a cross-platform GUI for Rclone designed to simplify cloud storage management for developers and power users.

Rclone is incredibly powerful but entirely CLI-based. RcloneView wraps that power in an intuitive graphical interface that makes it easy to:

• Transfer, sync, copy, or move files across cloud providers.

• Compare folders visually before syncing.

• Manage jobs with scheduling, history, and dry-run.

• Mount cloud storage as a local drive

RcloneView supports 40+ backends, including Google Drive, Dropbox, S3, OneDrive, MEGA, Box, and many others. It runs on Windows, macOS, and Linux, and ships with Rclone embedded (no separate install required).

Website: https://rcloneview.com

We built this for devs, sysadmins, and researchers who love Rclone but want a better UX. Would love your feedback, ideas, or even bug reports.

Made and open-sourced a little web-based tool I use to generate maintenance plans for IT. Let me know what you think, contributions are welcome!

Hi,

I built Equatile, a logic-based puzzle game where you arrange number tiles on a grid to make every row and column equal their target values.

It's built using Expo and is available for free on iOS, Android, and the Web.

It's a game I've had in mind for almost 10 years now but never got to actually develop, until I came across Expo which made the process incredibly easy. I might open source the code on GitHub.

I hope you enjoy playing it!

I've been building Limit, it's an Android app & website blocker that (really!) cannot be bypassed.

I'd attempted a bunch of blocking in the past, but kept finding trivial ways to disable the blocking. In the end I built Limit as a blocker I couldn't just disable.

It has pre-configured block lists for:

- Social media (algorithmic feeds) - Adult content - Gambling

Recently we added a 'hands off' mode for parents of ~teens - you can set up the device once, let Limit block social media, but without invading their privacy.

More technical explanation: https://limitphone.com/how-it-works

Hey! In my last job I was constantly wondering when it would be best to take days off so I could enjoy the most days off in a row, so I made this tool!

It tries to schedule PTO around holidays so that you get the most consecutive time off while spending as few days as possible.

You can set some constraints, customize the holidays and define mandatory vacation days (in case your company mandates them).

If you try for 2025, you should see results for the rest of the year. If there are unscheduled days, it's because there isn't a particularly good period to take them off. (I should make this clearer in the site, to be honest).

Let me know if you have any questions or comments and hope you get value out of it!

Bernardo

Hi HN,

I missed proper search on Bluesky, like Twitter used to have, so I built this. You can filter posts and profiles by keyword, handle, time and other search operators.

Would love feedback or ideas for what to add next.

Hey HN,

I built Gitpatch to make sending code patches as simple as git push.

The idea is that patch-based workflows are powerful but they're not very well supported by git platforms.

Gitpatch brings this model to any repository:

* Send patches by pushing branches (e.g. patch/my-patch-name)

* Apply any patch locally with one command

* Review them in a lightweight UI

* Stack patches with patchstack/ branches

This has been in development for some time, but things should mostly work. Would love any feedback, questions or ideas.

Thanks for checking it out.

let's just admit it, vibe coding a personal website is tiring, you have to design, code, host, get a domain blablabla; to get a good enough personal website, you have to spend at least 2 hours. And we all know building a personal website is a chore!

Acknowledging this, we built Noey.ai, you will be able to build your personal website by just filling a questionnaire, and we will handle the design part, code part and hosting part for you. Everything from signup to a goodlooking website in 4 minutes.

We're launching beta now, currently we only support building one-pager websites, text editing & image replacing. With more features coming soon! (multi-pager, social links, portfolio sections, blogs.. )

demo: I built this with only my resume and name. https://ixic.my-site.io/

Hi all,

I’d like to share a project I’ve been working on: Geo Calculation Toolkit API — a lightweight REST API that performs common geospatial calculations using coordinates and what I refer to as Geo Objects.

(Geo Objects include shapes like polygons, circles, polylines, and other forms with spatial meaning.)

[Why I built this]

A few years ago, I developed a real-time location tracking system. It was a rewarding experience to solve real-world problems using spatial data.

That project left a lasting impression, and recently I revisited some of the location-based logic challenges I encountered back then. I decided to turn a few of those ideas into reusable API features that could help other developers in similar situations.

Rather than handling large GIS datasets, this toolkit focuses on lightweight, real-time calculations involving location and spatial boundaries.

[How to try it]

You can find the full documentation and sample requests here:

GitHub → https://github.com/your-username/geo-calculation-toolkit-api

To test the API, please include the following header in your requests:

Header → X-RapidAPI-Key: cc8ca2c596mshb17640c8b5cc21bp13445ejsn7a138f181255

The key has a limited quota, so please note that it’s not intended for unlimited use. I hope that’s understandable.

I’d be happy to hear any thoughts, suggestions, or feedback. Thanks for taking the time to check it out!

I wanted to push myself to build something fun, fast, and playable entirely in the browser. I’m not a traditional game dev, but I’ve been experimenting with AI tools like Cursor (AI-powered IDE) and figured it might be possible to go from zero to playable in a week.

Ended up creating a 3D endless spaceship runner - you fly through space dodging UFOs and their laser beams. I used Three.js for the environment and leaned heavily on AI (mostly Cursor + ChatGPT) for scripting logic, fixing weird bugs, and optimizing gameplay feel.

I didn’t plan much. Just opened the IDE, started describing what I wanted to build to the AI, and kept iterating on what felt fun. The UFO obstacle behavior was surprisingly hard to tune without it getting too unfair. AI helped a ton with tweaking that.

The game runs in-browser with no downloads. I know it's rough around the edges, but shipping it in 7 days taught me more about building games (and about AI dev tooling) than anything else I’ve done recently.

Muapi is a developer-centric, fully hosted API platform tailored for rapid and scalable AI-driven visual content. Generate high-resolution images in under 2 seconds and cinematic videos in just a few minutes—all backed by robust cloud infrastructure, no GPU management, and seamless scaling.

We had a lot of feedback from users wanting to create a Jeopardy game using AI, as it took a lot of time to create a game manually.

So we added a new feature, "AutoGen," that lets users create a Jeopardy game using AI; they just need to add a topic and subtopic.

To try out the feature, simply go to our website, sign up for free, click on create a game and choose AutoGen.

This is fairly new, so we are offering 500 free tokens to try out the feature. Feedback appreciated!

Hi HN, I'm Vladimir Baranov — a builder of a tool called CalOverlap.

CalOverlap helps you find overlapping availability across multiple calendar links, like Calendly and Cal.com. It’s for those painful group scheduling moments when everyone says "here’s my link", and somehow none of them align. Instead of emailing back and forth or opening 6 tabs, you just paste in the links, and CalOverlap returns top overlapping time slots.

Here’s a demo with four links to show you how it works: https://caloverlap.com/ and instructions - https://www.loom.com/share/e1a34f8dd8674c10bdc29733c7e61724?...

This came out of a pattern I kept seeing in my coaching work with groups of founders and execs. Smart, busy people who all had scheduling links—yet still couldn’t book a meeting. The problem wasn’t lack of availability. It was lack of overlap visibility. Each person’s tool was doing its job, but nobody was coordinating across tools.

The current MVP supports both Calendly and Cal.com, with more platforms on the roadmap. It works entirely client-side—no signups, no tracking, just a quick way to see what works for everyone.

Why I built it

I've spent most of my life shipping software, coaching technical leaders, and wrangling calendars across companies and continents. I’ve built and exited startups in fintech and space-tech, but this project is refreshingly small and specific. It’s not trying to change the world. It’s trying to make scheduling less terrible.

There are other solutions—multi-scheduling apps, internal coordination tools—but they’re often overkill for the "let’s just book one call" use case. I wanted something so simple it felt like a shared calculator for time.

What’s next

Support for more calendar tools (e.g., SavvyCal, Cron, Outlook, Google)

A simple API version (some folks already asked to embed it into ops workflows)

I’d love feedback on the UX, edge cases, or other use cases you’d want this to handle. And if you’ve ever felt like scheduling is a tax on your soul, I’d love to hear that too :)

Thanks for checking it out.

—Vladimir https://caloverlap.com

We just open-sourced our mlflow plugin to generate html reports that let you interactively explore shap values. We're happy for any feedback. Feel free to ask here or submit issues to the repo.

How often do we save links or texts that we then never retrieve because we forget where they are or simply cannot remember the name of the website?

This happens to me often, so I decided to create SaveTo, a simple cross-platform app that allows you to save links that can then be retrieved via chat, without having to remember the exact name of a website or link library.

I've just opened the waitlist, and any feedback is welcome!

Hey HN,

We just launched Zams — a platform to build AI agents that automate repetitive B2B sales tasks like CRM updates, deal follow-ups, lead research, and forecasting.

You describe what you want in plain English, and your agent gets it done across tools like Slack, Notion, HubSpot, Salesforce, and more.

Zams agents run in two ways: - Command agents – Triggered on-demand from Slack or the web - Ambient agents – Run in the background on a schedule, using context from docs, emails, and dashboards

No brittle workflows, no “if-this-then-that” builders. Just intelligent agents that act.

We started building Zams 60 days ago. It’s now live, running across 100+ apps, and already in use by dozens of sales teams.

If you’re curious about agentic automation or tired of duct-taping tools together, we’d love your thoughts and feedback.

Upvote us on PH: https://www.producthunt.com/posts/zams-2

Best, Nirman Dave

I recently built my first ElectronJs app, a minimalist video compressor called DrinkMe. It uses a two-pass FFmpeg encode and estimates the final size based on the original video’s duration, resolution, quality, and size.

The idea behind it is to provide an alternative for non-power users who struggle/don't want to learn how to use CLI-based programs like FFmpeg, or even Handbrake (whose myriad of settings and options CAN be overwhelming).

The target reduction is usually around 80–85% of the original for high-res files, but it adjusts dynamically if the video’s already compressed.

All feedback is welcome!

Hi HN, I'm Gokhan, the founder of Brainbase Labs. Today we're releasing an early preview of our first generalist agent, Kafka. Kafka is the first AI employee, he comes with his own computer as well as his own email, phone and Slack so you can work with him just like you would with a regular employee.

You can forward him emails, give him a call, tag him on Slack.

We built Kafka as the basis for our other AI employees we will be releasing over the coming months. Kafka currently achieves 77.2% on the GAIA Level 3 benchmark, getting us closer to human performance at 87%. We've achieved this by creating a new type of planning algorithm called "structured planning" which allows Kafka to run very long term plans without getting sidetracked or hallucinating.

Kafka can do some cool things, he can push code to AWS, direct its own commercial using Veo3 and do actual production tasks on Upwork/Fiverr.

We're very keen to hear what HN thinks about Kafka, and how we can improve. Appreciate any feedback!

Easily add audio to your anki files using elevenlabs and this CLI tool.

Just wanted to share something I made that helped me a ton with my own outdoor project. It’s a free AI-powered landscape design tool that lets you:

- Upload a photo of your garden/backyard/patio, interior also support.

- Describe what you’d like to see (e.g., “add a deck” or “Japanese garden style”)

- Pick a design style (Zen, Cottage, Tropical, etc.)

- Instantly generate and download AI-generated landscape design ideas

You can check it out here: https://AILandscape.app

I originally built this to help myself avoid expensive trial-and-error. It’s free to try, and I'm looking for feedback from anyone into home improvement, landscaping, or just curious about what their space _could_ look like.

Let me know what you think – happy to improve it based on feedback!

- We build the Thread Inference Model (TIM) based on the transformer architecture, and its dedicated runtime TIMRUN.

- TIM + TIMRUN = Intelligent workflow generation, context engineering, and multi-hop tool use happens at the runtime level

- TIM + TIMRUN supports virtually unlimited reasoning enabled by context pruning, significantly improves the efficiency for long-horizon reasoning tasks

- Inference API is live at https://subconscious.dev/

- More details: https://github.com/subconscious-systems/TIMRUN

Hi everyone!

I created this website to make it easy to customize and export Unicode symbols as SVG or PNG, or simply copy them quickly with their HTML, CSS, or Alt codes.

It features over 70 categories, thousands of symbols, one-click copy, clipboard history, and fast symbol search.

Would love to hear your feedback!

I built PTS (Pivotal Token Search), an open-source library for mechanistic interpretability analysis of language models. The core feature is generating "thought anchors" - identifying which specific sentences in a model's reasoning chain significantly impact task success.

What it does:

- Generates chain-of-thought reasoning traces from any LLM

- Uses counterfactual analysis to measure impact of each reasoning step

- Identifies critical sentences that make-or-break task completion

- Exports semantic embeddings for clustering analysis

- Provides systematic failure mode categorization

Example use case:

I used PTS to compare Qwen3-0.6B vs DeepSeek-R1-Distill-1.5B on math problems and discovered they have fundamentally different reasoning architectures:

- DeepSeek: concentrated reasoning (fewer, high-impact steps)

- Qwen3: distributed reasoning (impact spread across multiple steps)

Quick start:

# Generate thought anchors

pts run --model="your-model" --dataset="gsm8k" --generate-thought-anchors

# Export for analysis

pts export --format="thought_anchors" --output-path="analysis.jsonl"

The library implements the thought anchors methodology from Bogdan et al. (2025) with extensions for:

- Comprehensive metadata collection

- 384-dimensional semantic embeddings

- Causal dependency tracking

- Systematic failure analysis

Why this matters: Most interpretability tools focus on individual tokens or attention patterns. Thought anchors operate at the sentence level, revealing which complete reasoning steps actually matter for getting correct answers.

Limitations: Currently focused on mathematical reasoning tasks. Planning to extend to other domains and larger models.

Links:

- GitHub: https://github.com/codelion/pts

- Research example: https://huggingface.co/blog/codelion/understanding-model-rea...

- Generated datasets: Available on HuggingFace

Would appreciate feedback on extending this to other reasoning domains or interpretability approaches.