SortFlow: Water Sort Puzzle

Pour liquid from one test tube into another until every tube holds a single color. When a tube is sorted, a cork goes in.

SortFlow is a water sort puzzle set on a chemist's bench: real test tubes in a brass rack, twelve mineral pigments and the sound of glass. There is no timer and there are no lives, so you can think each pour through.

How the color sort works
• Tap a tube to lift it, then tap another to pour
• Pour onto the same color or into an empty tube
• Sort every tube to finish the level
• Fewer moves earn more stars

Hundreds of levels
Every level is generated and checked by a solver before you play it, so every board can be solved. From level 51, every fifth level is a mystery: the colors below the top stay hidden until they rise to the surface.

Help when you need it
A hint shows the best next move, worked out by the same solver. Undo a pour, add an empty tube, or skip a level.

Every day
A daily challenge with a streak to keep, and a free spin of the lucky wheel for coins and power-ups.

Worlds and collections
Six worlds, from Ocean to Volcano, open as you progress. Spend the coins you earn on tube styles and backgrounds.

Easy on the eyes
• Colors chosen to stay distinct, with an alchemical sign on every color in color-blind mode
• Light, dark and AMOLED black themes
• Plays offline
• Free with ads; one purchase removes them

Recent changes:
What's new in 1.3.4
• Witch's Brew (24 Oct to 2 Nov) happens on the bench after dark: a moonlit window, bats and glowing vials
• A new icon from the bench: a mixed tube beside a sorted, corked one in the brass rack
• Real test tubes in a brass rack: each colour settles into one body of liquid, and a cork goes in when a tube is sorted
• New glass and liquid sounds: every sorted tube rings one note higher