The route, the clock and the camera have to agree

An FPV prompt is not prose. It is a timeline that has to tile the whole shot with no gap and no overlap, a stop order that has to ascend, an image pack whose count has to add up, and a camera that has to be somebody — because a drone has no walking bob, a robot vacuum cannot climb stairs, and a cat cannot float over a table. Most FPV prompts fail on one of those four, and all four are arithmetic.

The checker is free and needs no account. Paste a prompt and the timeline, the stop order, the POV physics and the avoid list are all checked in your browser. It reads an avoid list as an avoid list, so it never reports a prompt for the thing it forbids. Every lane also ships a worked example that costs nothing. Writing a prompt needs credits.