Puzzle with anyone, wherever you are
You make a room, send the code or the link by text message, and whoever has it joins in. Nothing to install and no account. It works with your partner on the couch just as well as with your mom two hundred miles away. Everyone gets their own color, so you see who filled in which letter.
It is a multiplayer crossword, but not a race: no clock, no points. Whoever sees a word types it. A thin border in someone’s color shows where they are working, so you are not both mulling over the same word.