property of Andy Ko — return when found

The Idea
Sketchbook

a working notebook by Andy Ko · product thinker

I can't stop redesigning the things I use. This is where the half-formed ideas, the "why does no one build this?", and the stuff I actually shipped all live — scribbled first, shipped second.

Flip to the ideas → See what I built
start here

Who's scribbling § 01

Hi, I'm Andy. I look at products the way some people look at crossword puzzles — I can't leave the gaps alone.

By day I do product: figuring out what to build, why it matters, and how to make it feel obvious in hindsight. By night, apparently, I fill notebooks like this one.

  • I keep a running list of "products that should exist."
  • I do teardowns of apps I love (and ones I love to hate).
  • I ship prototypes to feel the idea, not just describe it.
  • I believe the best specs read like a good sketch: fast, and honest about what's unfinished.

The idea vault § 02

Public sketches, locked write-ups. The gist is free — the full spec, the wireframes, and the go-to-market thinking are my IP, so those sit behind the lock. Have the key, or ask for it.

Things I actually built § 03

Sketches are cheap. Here's where the idea survived contact with reality.

Scribble in the margins § 04

Want the key to a locked idea, want to build something, or just want to argue about a teardown? The margins are open.

Ideas & write-ups © Andy Ko · shared in confidence · please don't reproduce without asking.