Ask Koi how something works, and it draws it

Ask anyone how a jet engine works and watch their hands. They draw it in the air. A fan here, the fire in the middle, air shooting out the back. Words alone are a bad way to explain a thing with parts.

Koi could already point at your screen and circle a button. Now, when you ask how something works, it draws the answer too, right beside what you asked about, while it talks.

• A card: cream grid paper, written in Koi's hand. Koi's pointer draws each box, arrow and word as it explains, like someone at a whiteboard.
• A 3D scene: the thing itself on a dark stage, built part by part. Labels line up beside it, arrows show the airflow, parts slide into place, and the steps sit in a caption strip underneath.

Drag the model to turn it, scroll to zoom, and click a step to fly to the parts it's about. Ask a follow-up and Koi adds to the same picture instead of starting over. Ask for something new and the old one folds into a little pill in the corner, one click from coming back.

The window has a download button. Save a PNG to drop in a doc, or save the card or scene as a .koi file. Double-click it next week and it opens in Koi, still turning. That one costs nothing: it's rebuilt on your Mac, no AI involved.

1. Start a call with Koi.
2. Ask “how does a car engine work?”, “explain photosynthesis”, or “show me how this tripod mount attaches, in 3D”.
3. Watch it build. Interrupt whenever you like.

It's great for studying: on a study question Koi takes it step by step through the picture instead of reading you a paragraph. Each picture counts against your plan's Koi, like the call. The full how-to is here, and if you have a manual rather than a question, drop it on the notch.