Mathlip

Mathlip hands you a grid of numbers that is already full but in the wrong order, plus a set of constraint chips above it: this group sums to 128, these cells descend, these multiply to 5082. Each chip shows its target and how close you are. You drag or tap two tiles to swap them, and you keep swapping until every chip is satisfied at once. Tapping a chip lights up the cells it covers, so you can see which tiles it depends on.

The grids run from a 3x3 tutorial to 7x7 Expert boards with up to nine constraints. There are eight kinds of rule: sum, unique, sequence, odd or even, ordering, arithmetic sequence, product and divisibility. Harder grids layer several of them over the same cells, so one swap can fix one rule and break another. There are no timers that end the game, no lives and no account; a move counter and clock are shown, and there are three hints per puzzle by default, with undo and redo.

The daily challenge is one puzzle a day, the same for every player. Monday's is gentle and the week climbs until Sunday's is an Expert grid, and solving daily keeps a streak. The listing is clear about the cost: the first week of dailies is free, and after that the daily lives in a one-time pack called The Daily Grind. The app has 35 free puzzles and 180 more in four one-time packs, with no ads and no subscription.

Mathlip is made by XpMind and came out on the App Store in April 2026. It works offline and has a colorblind mode with letter markers. It suits players of KenKen, Kakuro and other arithmetic logic puzzles who want a different mechanic: rearranging rather than filling in.