A fantasy car museum. Museums hold halls, halls hold cars, and a car can be loaned to another hall as a guest without the record being copied — edit it anywhere and it changes everywhere, because there is only one of it.

The part that surprised me is how much of it turned out to be about place rather than data. A museum has a floor with a size in squares; halls are rooms standing on it, any shape you like, with doorways where they share a wall and a numbered route through them. A car is a bay inside a room wearing its own photograph. None of that is required — a museum you have never arranged draws itself — but a collection you can walk through is a different thing from a collection you can sort.

Everything lives in the browser. No account, no server, nothing to pay for, and the backup is a file you download. Sync across devices is off until you turn it on, and the app is complete without it.

There is a wanted list for cars you are chasing, running costs for what keeping one takes, and a deaccession that moves a sold car to the past collection with its whole history intact, because selling is not deleting.

It wears a new design as of September 2026. The first look was a gallery after dark — bevelled cards on a vignetted ground, one gold accent doing every job there was. This one is petrol-black rooms and bone ink, square corners, and rules instead of cards, with burnt orange reserved for money and verdigris for everything to do with finding your way. The pictures it used to carry are kept in the archive, because a redesign only reads next to the thing it replaced.