Rank Sort

Rank Sort — a sorting puzzle with exactly one rule.

A toothbrush, a vacuum, a refrigerator. Put them in order, heaviest last.

Easy. Now — the refrigerator, or a kangaroo?

The rule takes three seconds to learn. The answers take rather longer.

Take a card from your hand and slide it into the right gap in the row. Land it and the row grows. Miss and you lose a heart. That is all there is to learn.

How long a shark lives. How tall a tower stands. The things you thought you knew are the ones you second-guess. You will catch yourself saying "huh" and starting the next level anyway.

■ Features

• One rule. No tutorial to sit through

• Solve one, and there is still another

• It is not only about weight — height, price, speed, lifespan and more

• Animals, vehicles, sports, food. A different subject every time

• One puzzle a day that belongs to that day only

• Works with no signal at all

• English, Japanese, Spanish and French

• Free to play

■ The board starts pushing back

A locked row. A card on a timer. A number you cannot read. You will understand each one the moment you meet it.

■ How to play

1. Pick a card from your hand

2. Drag it into the right gap in the row

3. Right, the row grows. Wrong, you lose a heart

■ Who it is for

• Anyone who likes numbers, quizzes and trivia

• Anyone who wants a game that ends a round quickly

• Anyone who needs something playable in silence, on a train

• Anyone who likes a game that leaves something behind

If you enjoy sorting puzzles, order puzzles, ranking games, higher or lower, guess the order, trivia puzzles, brain training, logic puzzles, comparison games, free puzzle games or offline puzzle games, Rank Sort gives you a new way to play.

Put the world in order. Rank Sort, starting at level one.