must be one vs Equalize

must be one is a number puzzle built on a single rule — the one in its name. A grid of numbers. Four operators. Combine neighboring tiles with arithmetic and collapse the whole board down to a single 1. That's the entire game: all becomes one. It reads as obvious for about three moves. Then it doesn't. - One rule, no filler — no twenty-minute tutorial, no menus to dig through. You understand it in seconds and spend the rest of your time actually thinking. - Always solvable — every stage is generated so that a solution is guaranteed to exist before you ever see it. If you're stuck, that's on you, not the board. - A climb that keeps widening — early stages stay in single digits; later ones open the range up and the arithmetic gets meaner. - Free, and quick to pick up. One stage on the train; look up an hour later. From office-canard — a one-person studio making small, system-first games. If this one gets its hooks in, there are more small games where it came from.

Every tile on the board holds a number. A single target appears at the top. Your goal is simple: make every tile match it. Use operation cards such as +1, −2, ×2, and ÷3. Each card affects an entire row or column—never just one tile. Swipe a card across the board and every number in that line changes at once. That simple rule creates the challenge. Fix one tile and you may throw another off. The order of your moves determines whether the board falls into place—or falls apart. SOLVED, NOT SHUFFLED Every board is verified by an exact solver before release. The move count shown is not an estimate; it is the true shortest solution. No impossible levels. No filler. EVERY MOVE MATTERS You receive exactly the operation cards required by the shortest solution, with no extras. Waste a move and the game tells you immediately. Undo is free and unlimited. Stars reflect mistakes made while solving. Using hints does not reduce your stars. A REAL DIFFICULTY CURVE Take on 486 levels across five chapters, from Basics to Master. Boards expand up to 6×6. Later, ×3 and ÷3 introduce competing divisibility rules, while locked tiles add another layer of strategy. The final chapter is called Master for a reason. A NEW PUZZLE EVERY DAY Play one new daily board—the same puzzle for every player, available even when you are offline. DESIGNED TO RESPECT YOUR TIME • No account or sign-up • Full offline play • No timers, lives, or energy bars • Available in six languages • Optional hints that are never required to finish a level An optional one-time EQUALIZE PRO upgrade removes automatic ads and grants 60 bonus hints. Optional rewarded ads remain available. Additional hint packs are sold separately. Everything else is complete and playable without spending anything.