Noggin — four small daily puzzles, one score a day

Noggin is a shelf of small daily puzzles, the same for everyone, reset at midnight.

Spectrum — six things and one hidden scale. Drag them into order; the real numbers are revealed at the end.

Rung — a word ladder. Change one letter at a time, every step a real word; par is the true shortest path.

Vault — a hidden code and nine guesses. Every guess says how many symbols are exact, near or far, never which.

Deduce — a logic grid. Four people, three things about each, clues that rule things out. Exactly one arrangement fits.

Each game is scored out of 100, so the four add up to one number for the day, out of 400. A second shelf holds a 5×5 crossword and a few visual games that do not count toward the day. Scores and streaks are kept from your first puzzle, no account needed; friends can compare days through a group link, and every past day is playable from the archive.

Plays here in the frame or at noggin.games, where it installs on a phone with optional daily reminders. Difficulty is computed, not guessed: every puzzle in the year-deep banks is verified by its generator before it ships. Feedback on which game lands and which does not is the thing I most want.