Lattice: Number Logic

Lattice is cross-math the way it should feel: quiet, fair, and beautiful.

Fill the grid so every equation is true. No guessing — ever. Our engine mathematically proves each puzzle has exactly one solution and grades it by how deep the deduction goes, never by how big the board is.

• 12 worlds, 1,000+ proven puzzles — frozen slots, forged tiles, two-sided equations, mystery operators, orbits, dials, a 3D cube and a pyramid • A daily board with streaks, an endless cascade arena with a replay-verified leaderboard (scores are recomputed server-side — no fakes) • One fair price. No subscription, no account. Worlds 1–3, the daily, Endless and Dials are free forever; one purchase unlocks everything else for good. • Offline always works. Your progress lives on your device.