Reyn – local-first AI that journals and recalls your work
Hey HN, I built Reyn - which I like to describe as "granola but for everything". You're probably thinking another screen capture AI tool (which is true). Same as always, the biggest question that comes up is privacy, so I'll talk about that first 1. raw screen data is never stored in the cloud 2. user controlled filters are granular to the point that you're able to configure specific apps, windows, websites, or even keywords to be discarded immediately (once again never leaving your mac) and never captured down the pipeline I personally built it because I find it useful and always had the…
Reyn – local-first AI that journals and recalls your work launched on June 17, 2026 with 6 votes, #2,066 of 22,647 launches that month and more than 75% of that year's launches.
What it does
Reyn is a privacy-first desktop AI for Mac that watches your screen, builds a private journal of your work, and answers questions about your week. Ask anything about what's on your screen right now. Every call captured; decisions, action items, what was said. A full daily recap emailed every evening. Built for people who lose the thread. Your work, finally remembered.
Reyn is a privacy-first desktop AI for Mac that watches your screen, builds a private journal of your work, and answers questions about your week — your raw screen never leaves your device.
In the maker’s words, at launch
Hey HN, I built Reyn - which I like to describe as "granola but for everything". You're probably thinking another screen capture AI tool (which is true). Same as always, the biggest question that comes up is privacy, so I'll talk about that first 1. raw screen data is never stored in the cloud 2. user controlled…
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Second Brain for Mac and WindowsJul 2026 · thesecondbrain.dev · ▲247Give your team one AI memory. Keep your own private.
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I run a vision model on every screenshot, locally, on a 4GB GPUJun 2026 · github.com · ▲36AI-powered screen memory — captures, analyzes, and lets you search/chat your screen history. Powered by Gemma 4 . 100% local, 100% private. - ayushh0110/ScreenMind
ToolKuai – Privacy-first, 100% client-side media toolsJan 2026 · toolkuai.com · ▲8Hi HN, I’m Linn, the creator of ToolKuai (https://toolkuai.com). Like many of you, I’ve always been wary of "free" online file converters. Most of them are black boxes: you upload your private documents or images to a remote server, and you have no idea where that data ends up or how it’s being used to train models. I wanted to build a suite of tools (Video/Image compressor, OCR, AI Background Remover) that runs entirely in the browser. No files ever leave your machine. The Tech Stack To make this performant enough to rival server-side processing, I leaned heavily into modern…
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