You know how you're in a conversation in ChatGPT and think, "I'll need this later," but don't want to stop what you're doing?

Then you're in Claude. Cursor. Chrome. Before long, you've got little things scattered everywhere. An answer you want to keep. A link. An idea. Or three follow-up prompts before the current one is even finished.

I had the same problem, so I built Copper.

Copper combines the useful parts of a to-do list, a clipboard, and a scratchpad into one app built specifically for AI-assisted work.

Whenever I find something worth keeping, I hit Shift twice and capture it. If I have a few prompts I want to try next, I just type them into Copper, then Cmd C back into ChatGPT, Claude, or Cursor, and check them off as I go.

I've been using it every day for months. It's become part of how I work across multiple projects and multiple apps.

I wanted something I could trust with my own work. So Copper doesn't sync anything, doesn't collect anything, and doesn't need an account. Your notes are saved to a local file. Everything stays on your Mac.

If this feels like something you'd use, it's $39. One-time purchase.