What’s new in 1.0.0
Pop it. Stack it. Score it.
The board starts full. Tap a piece and it pops onto your stack, and a new piece fills the hole it left. Three on top that agree clear — and the three underneath may go in turn.
A trio clears when each attribute is all the same or all different. The attributes are judged separately — colour can be all-same while the shapes are all-different. One attribute out of step and nothing happens.
✓ Clears
Three colours, three shapes, orders 1‑2‑3, three arrows. Every attribute is all-different, so every attribute agrees.
✗ Doesn’t clear
Two reds and a blue. Every failure in Stackit is the same shape: some attribute splits two-and-one.
Red, blue, yellow — each tile also carries its initial, so the rule never depends on hue alone.
Circle, square, triangle, drawn as an outline you can read at a glance.
One, two or three. Read 1‑2‑3 up the stack and it scores double; 3‑2‑1 scores triple — and that one has to be planned backwards.
The fourth attribute. Free play uses three; the arrow makes it the full puzzle.
Every piece is in front of you from the first turn, and each one always lands on top. So what you are choosing is the order they arrive in.
It leaves the board and lands on top of the stack, and a new piece fills the hole it came from. The board never runs out.
Only the top three are ever judged. When they go the stack closes up, and the three now on top may agree in turn.
Tap the top of the stack and it moves to the hold spot; tap the spot and it goes back on. Free, unlimited, and the only way to change what the next three will be.
One seed for the whole world, rolling over at midnight UTC so nobody’s time zone gets a head start. Everyone plays it on the full four-attribute rule, on the 6×6 board, for the same 60 moves — and with the same three sweeps, whatever you have set for yourself.
Stackit is bought once, on iPhone or on Android — one payment, no subscription, no ads, and nothing left to unlock once you have it.