A landscape spatial puzzle
Stack cubes on the board so that the front and side projections both match their targets at the same time. It is the classic three-view drawing exercise from geometry class, rebuilt as a game you can solve with your thumbs.
Every tier introduces a new wrinkle. The last 30 levels move to a larger 6×6×6 space.
Three hints per level in the later tiers, pointing at a block to add or one to remove.
No sign-in, no advertising, no analytics. Progress is stored on your device and nowhere else.
No internet connection required. The app makes no network requests at all.