Your Mind

A capture-first, iPhone-native second brain. See something worth keeping, one gesture saves it now, and later you can ask it anything and get answers you can actually trust.

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Why I built it

I've started a second brain like five times. Notion, Obsidian, a graveyard of screenshots. They all die at the same moment: you see something worth keeping, and the app makes you decide where it goes. So you don't save it. Your Mind kills that decision.

What it does

You see something on your phone. One gesture, a Shortcut, the Share Sheet, or a quick thought, and it's saved. You stay where you are and get a "Captured, Undo." For 5 seconds it's fully local, nothing uploads, so a mistap costs nothing. If you don't undo, it keeps the raw evidence and quietly turns it into knowledge. No folders, no tags, no naming, ever.

Why it's different

The original is sacred. Every summary and connection sits on top of the raw evidence, never replaces it. Tap any claim and it jumps to the exact thing it came from: the text range, the image region, the URL. Ask a question and the answer cites its sources. If the model isn't sure, it says so instead of making something up. Delete a source and its knowledge goes with it.

How

iPhone-first SwiftUI app with a Shortcut route, Share Extension, and a shared Swift capture package. Backend is a Cloudflare Worker (TypeScript, D1, R2) with immutable raw storage. Extraction and grounded answers run on OpenAI's Responses API, with every quote anchored to an exact byte range so citations can't drift.

Codex was in it end to end. I used it to pressure-test the idea and get clarity on what this actually is, then to work out the capture mechanics against iOS's real limits (what a Shortcut can hand you, what the Share Sheet exposes, how the Undo window has to behave). It wrote the backend and UI specs, built the backend, and helped generate the UI, with GPT image for the visual direction. And it did the the bug fixes and the edge cases.

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