Hold down your iPhone's action button and Grokbot explains what's on the screen Key Build it as a free iPhone shortcut. Hold the button on any reel, video or web page, ask your question out loud, and the answer comes silently as a notification. It works from a screenshot of your screen, plus the post, its comments, and a web search. His examples: Ask about the video you're watching, get a breakdown of an article, or ask him to build what you saw on a reel for your business. Shortcut is open source and fully customizable; It says you can switch it to talk back to you as you scroll. Elon Musk's response: "Cool. ".