Nine short word games, each with one new puzzle a day that is the same for everyone. They are free, there is nothing to sign up for, and most take two to five minutes.
Stepwise, Rarest, Handful, Unquote, Daisy and Eightfold change at midnight UK time. Letterly, Cluster and Rankle change at midnight UTC, which is 1am in the UK during British Summer Time.
Finish at least one daily on a day and your combined streak goes up. Miss a whole day and it starts again. Streaks are kept on your device, so no account is needed.
Yes. Each of the six newer games keeps the last seven days in its archive, playable just for fun.