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app.kamui.dev
Welcome to Kamui
神威
Kamui
A second surface for your Mac. Press both command keys and everything you've copied, captured, run or half-finished is right there — and gone again the moment you're done.
The film
Thirty-six seconds, start to finish.
No cuts and no screen recording — this is the interface itself, drawn live in your browser. Click a chapter to jump.
plaintext kind emitted on addBlock
How it works
Three moves. That is the whole manual.
Every tile below is live. Use your keyboard and your mouse — nothing here is a recording.
01
Press both command keys
Kamui slides in over whatever you were doing. No Dock icon, no window to find, no app switch — it is simply there.
canvas.present()
}
02
Drop anything on it
A file, a link, a colour, a snippet. Kamui reads what it is on the way in and gives it the right shape — no menu, no "new item" dialog.
03
Press them again
It leaves the way it came. Your windows, your focus, your clipboard — untouched. Everything you dropped is waiting for next time.
Blocks
Twenty-one kinds of thing. Kamui knows which one you dropped.
Every type below ships in the app today. Hover or tap one to see how it actually renders on the canvas.
• Terminal blocks keep their session
• Studio exports at 2× and 3×
• 14 bugs, one of them embarrassing
1.4
Canvas themes
Ten canvases, from Midnight to Forest.
The surface itself has a palette. Pick one below and the preview above re-skins itself — exactly as it does in the app.
Feel
Built like a part of macOS, not a website in a window.
Native AppKit and SwiftUI, Metal-backed, tuned for the trackpad. Throw the blocks below around — they have weight, and they stop where you would expect them to.
Sync & privacy
Sync you do not have to trust us for.
Two Macs, one canvas, and a server that only ever sees ciphertext. There is no account because there is nothing for one to protect.
01 — ON YOUR MAC
Encrypted before it moves
Every block is sealed with AES-256-GCM on the device that made it. Layout and position sync in the clear; the content never does.
02 — TWELVE WORDS
Your key is a sentence
A recovery phrase, derived into keys with HKDF-SHA-256, stored in the macOS keychain and synced by iCloud Keychain to your other Macs. We never see it.
6c9d…f2a1 · 1,204 bytes · opaque
03 — ON OUR SIDE
Nothing readable, by design
Our servers store and relay bytes they cannot open. A breach would leak your block count and not much else. That is the whole point.
Pricing
Free on one Mac. Paid when you want it on all of them.
No trial timer, no seats to count, and no upsell inside the canvas.
- End-to-end encrypted sync
- Unlimited devices
- Version history
- Early access builds