Is Madridoku free to play?

Yes. Madridoku runs in a browser at no cost, with nothing to install and no purchase to make.

How often does Madridoku reset?

Once a day. Everybody gets the same puzzle, and a new one replaces it when the game's day rolls over.

On madridoku.com, and you can play it inside this page without leaving Alldle.

It sits in Transport, alongside the other daily games of that kind in the catalogue.

Transport 2 plays

Daily logic puzzle about the Madrid Metro: place nine stations on a 3x3 grid using intersecting line, zone, and naming clues.

Madridoku

Transport

Is Madridoku free to play?: Yes. Madridoku runs in a browser at no cost, with nothing to install and no purchase to make.
How often does Madridoku reset?: Once a day. Everybody gets the same puzzle, and a new one replaces it when the game's day rolls over.
What languages does Madridoku support?: Spanish.
Where does Madridoku run?: On madridoku.com, and you can play it inside this page without leaving Alldle.
What kind of game is Madridoku?: It sits in Transport, alongside the other daily games of that kind in the catalogue.

If you play Madridoku, the closest things to it in the catalogue are CarGuesser, Cardle and Planespottle. They sit in the same transport category. See the full list of alternatives.