Each glass starts as a layered mess — blue over green over red — and your job is tidiness. Water Sort Puzzle gives you a row of glasses filled with stacked colors, a couple of empty ones, and one rule that generates all the difficulty: you may only pour a color onto the same color, and only when there's room. Sort every glass to a single, solid color and the level clicks shut.

It's chess at the pace of a screensaver. Early levels teach the grammar in a minute; later ones — and there are hundreds — punish greedy pours, because every glass you fill wrong becomes a wall. The empty glasses are your working memory, and spending them early is the classic blunder. Stuck is not a dead end, though: restart freely and re-plan, no penalty, no timer ticking anywhere.

Everything about the presentation serves calm: bright colors, smooth pouring animations, one-finger controls, no noise. It runs fully offline, too, which makes it an ideal pocket ritual for flights, queues, and the last ten minutes before sleep — a little logic workout that lowers your heart rate instead of raising it.

From IEC Global, it's the sort of puzzle that spreads by being watched over a shoulder. Simple enough for a child to grasp, deep enough to embarrass an adult on level 200. If untangling things is your love language, this one's yours.