Show HN: Satellite imagery object detection using text prompts https://ift.tt/QOCzo1S

Show HN: Satellite imagery object detection using text prompts I built a browser-based tool for detecting objects in satellite imagery using vision-language models (VLMs). You draw a polygon on the map and enter a text prompt such as "swimming pools", "oil tanks", or "buses". The system scans the selected area tile-by-tile and returns detections projected back onto the map as GeoJSON. Pipeline: select area and zoom level, split the region into mercantile tiles, run each tile with the prompt through a VLM, convert predicted bounding boxes to geographic coordinates (WGS84), and render the results back on the map. It works reasonably well for distinct structures in a zero-shot setting. occluded objects are still better handled by specialized detectors like YOLO models. There is a public demo and no login required. I am mainly interested in feedback on detection quality, performance tradeoffs between VLMs and specialized detectors, and potential real-world use cases. https://ift.tt/PgWLdfv March 9, 2026 at 01:22PM

Show HN: Caloriva – A calorie tracker that actually understands https://ift.tt/xfjaHnw

Show HN: Caloriva – A calorie tracker that actually understands I have built Caloriva because I got tired of the "search-select-confirm" loop in every other fitness app. I wanted something where I could just chat, and have the data structured automatically. What it does: Parses natural language for both food and exercise. Automatically calculates macros and tracks which muscle groups you've trained. No bloated UI, just a fast way to log and get on with your day. It’s live at https://caloriva.app. I’d love to hear your thoughts on the parsing accuracy and what features would make you actually switch from your current tracker. March 10, 2026 at 12:02AM

Show HN: Colchis Log – cryptographic audit trail for AI systems (Python) https://ift.tt/wntFj16

Show HN: Colchis Log – cryptographic audit trail for AI systems (Python) Built a tamper-proof execution logging library for AI systems. SHA-256 hash chain detects any tampering. Content-addressable payload store. CLI + Web interface. Works fully offline. Ko-fi: https://ift.tt/WqtfJrh https://ift.tt/skCJ64K March 10, 2026 at 12:02AM

Show HN: Ratschn – A local Mac dictation app built with Rust, Tauri and CoreML https://ift.tt/WeK3aGb

Show HN: Ratschn – A local Mac dictation app built with Rust, Tauri and CoreML Hi HN, I'm the solo developer behind Ratschn. I type a lot and got extremely frustrated with the current state of Mac dictation tools. Most of them are either heavy Electron wrappers, rely on cloud APIs (a privacy nightmare), or force you into a SaaS subscription for a tool that essentially runs on your own hardware. I wanted something that feels native, respects system resources, and runs entirely offline without forced subscriptions. The stack is Rust, Tauri, and whisper.cpp. Here are the design decisions I made: Model Size vs. Accuracy: Instead of using the smallest possible model just to claim a tiny footprint, the app downloads a ~490MB multi-language Whisper model locally on the first run. I found this to be the sweet spot for high accuracy (accents, technical jargon) to drastically reduce text correction time. Hardware Acceleration: The downloaded model is compiled via CoreML. This allows the transcription to run directly on the Apple Neural Engine (ANE) and Metal on M-series chips, keeping the main CPU largely idle. Memory Footprint: By using Tauri instead of Electron, the UI footprint is negligible. While actively running, the app takes up around 500MB of RAM. This makes perfect technical sense, as it is almost entirely the ~490MB AI model being actively held in memory to ensure instant transcription the millisecond you hit the global shortcut. Input Method: It uses macOS accessibility APIs to type directly into your active window. Business Model & Pricing: I strongly dislike subscription fatigue for local tools. There is a fully functional 7-day free trial (no account required). If you want to keep it, my main focus is a fair one-time purchase (€125 for a lifetime license). However, since I highly value the technical feedback from this community, I generated an exclusive launch code (HN25) that takes 25% off at checkout (dropping it to roughly €93 / ~$100). Bug Bounty: Since I'm a solo dev, I know I might have missed some edge cases (especially around CoreML compilation on specific M-chips or weird keyboard layouts). If you find a genuine, reproducible bug and take the time to report it here in the thread, I will happily manually upgrade you to a free Lifetime license as a massive thank you for the QA help. I'd love to hear your technical feedback on the Rust/Tauri architecture or how the CoreML compilation performs on your specific Apple Silicon setup. Happy to answer any questions! https://ratschn.com March 9, 2026 at 11:56PM

Show HN: The Mog Programming Language https://ift.tt/BgHhU7i

Show HN: The Mog Programming Language https://moglang.org March 9, 2026 at 11:27PM

Show HN: Proxly – Self-hosted tunneling on your own domain in 60 second https://ift.tt/YP0oWht

Show HN: Proxly – Self-hosted tunneling on your own domain in 60 second Proxly is a self-hosted tunneling tool that exposes local services through subdomains on your own VPS. npm install -g @a1tem/proxly, run proxly, and the interactive wizard sets up your first tunnel. No bandwidth caps, no session limits. Built it because frp's config is painful and ngrok's free tier is too limited. Open source, MIT licensed. GitHub: https://ift.tt/7KfAd1P March 8, 2026 at 03:34PM

Show HN: I built a daily game that tests if you can tell 1999 apart from 2005 https://ift.tt/b2P1GSM

Show HN: I built a daily game that tests if you can tell 1999 apart from 2005 https://yeartobeat.com/ March 7, 2026 at 11:14PM