Is Duplixo free to play?

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

How often does Duplixo reset?

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

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

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

Misc New

Play a collection of daily word, logic, geography, trivia and classic browser puzzles, with answer guides, hints and practice modes.

Duplixo

Misc

Is Duplixo free to play?: Yes. Duplixo runs in a browser at no cost, with nothing to install and no purchase to make.
How often does Duplixo 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 Duplixo support?: English.
Where does Duplixo run?: On duplixo.com, and you can play it inside this page without leaving Alldle.
What kind of game is Duplixo?: It sits in Misc, alongside the other daily games of that kind in the catalogue.

If you play Duplixo, the closest things to it in the catalogue are AITA Guesser, Face Guessr and Minigolfle. They sit in the same misc category. See the full list of alternatives.