Stackt: Color Sort Puzzle

A soothingly satisfying color-sort puzzle. Clear every stack to one color, then take on today's Daily Challenge — how long can you keep your streak?

Stack, sort, and clear your way through an endlessly satisfying puzzle.

Every stack holds a mix of colors. Tap to lift the top piece, then tap again to drop it onto a matching stack, or an empty one if you need the room. Clear a stack down to a single color and it's solved. Clear the whole board and the round is yours.

ENDLESS, EVER-HARDER ROUNDS There's no level select, just tap Play. Round 1 eases you in; every round after adds height, colors, or tighter margin for error. How far can you climb?

DAILY CHALLENGE One puzzle, the same for every player, every day. Solve it to keep your streak alive, miss a day and it resets, so the pressure's real.

TIME CHALLENGE Race the clock instead of the board. Solve as many puzzles as you can before time runs out.

DESIGNED TO FEEL GOOD Frosted-glass pieces, a dark industrial aesthetic, layered haptics, and procedural sound on every move. Stackt is built to be picked up for two minutes and put down forty minutes later.

FREE TO PLAY Stackt is free, with the occasional ad between rounds. Prefer an ad-free run? A single one-time purchase removes them for good, no subscription.

BUILT FOR EVERYONE Full VoiceOver support, Dynamic Type, and a Reduce Motion mode that trims animation without touching gameplay.

No account. No always-online requirement for the puzzle itself. Just you, the stacks, and however many rounds you've got in you today.