Casrion Download

Notes, minus the part where you stop to take them.

The moment worth keeping and the moment you have time to write it down are never the same one. So Casrion puts the whole detour on one key. You copy the line, you press it, you keep reading.

The key decides the shape

A capture that lands as a wall of text is barely better than the clipboard, so the key you press picks how it arrives. On the left is what was on your screen. On the right is exactly what your note file gained, character for character.

Plain Markdown, in a file you chose, on a disk you own. Nothing you can only open again by opening this.

• Keep it as it isCtrl+Shift+C
• Keep it as a headingCtrl+Shift+1
• Keep it as codeCtrl+Shift+K
• Drop in a screenshotCtrl+Shift+V
• Undo the last oneCtrl+Shift+Z

Twenty of them altogether, and the rest are on your platform's page. Voice memos, a whiteboard, a writer that floats over everything. On a Mac it is Cmd, with three exceptions macOS keeps for itself.

It remembers where you got it

A quote with no source is half a note. Every capture can carry the page it came from, the app, and the time, written into the file underneath it rather than into a database you would have to keep.

And it explains what you don't know

Sometimes the problem is not keeping the sentence, it is that the sentence means nothing to you yet. Select it, press CtrlShiftE, and a small window explains it where you are standing. It reads the screen around your selection first, so it knows a stray symbol belongs to the formula three lines up.

That is a language model sitting on your own disk. Nothing is sent anywhere. It stays unloaded until you look like you need it and hands the memory back five minutes after you stop.

Some things are a diagram

Not everything wants to be a sentence. Hit the whiteboard key anywhere, draw the thing, and it drops into the note as an ordinary .svg that opens in any browser with or without this app. Double-click it later and the markers are still there.

Nothing leaves your machine

Casrion makes no network requests. Not fewer than most. None. Delete it tomorrow and every note you made is still sitting there, readable in Notepad.

Go get it

Pick your side. Each one has its own keys, its own two minutes of setup, and its own list of things that might go wrong.

No email, no sign up, no trial that expires. It is one person's app and it is free.