Hex Clear is a block puzzle, but the board is hexes instead of squares. You get three pieces. Drag them on. When a whole line fills, a row or a diagonal, it clears.
Classic is an empty board. Today is a new one each day. Endless lets you turn pieces if you want. Puzzle is packing holes until you get stuck.
A star on a tile is an undo. Clear that line and you keep it. Games save on the phone. No account.
Block puzzle on a hex board. Drag pieces, clear lines.