Vsota

Vsota is a number-logic puzzle for people who love the quiet click of deduction. Each board is a grid of runs — short rows and columns of empty cells — and every run carries a clue: the total its digits must add up to. Using the digits one through nine, with no digit repeated inside a single run, you work out which numbers can possibly fit, then narrow them down until the whole grid locks into place. It's part arithmetic, part pure logic, and wholly absorbing once it clicks.

The logic is the real thing. Every puzzle has exactly one solution, reached by reasoning alone with no guessing required, and the board checks your entries live — satisfied runs settle, clashes and over-sums flag gently so you always know where a mistake crept in. Pencil-mark candidates into a cell while you think, commit a digit when you're sure, and feel the board tighten toward its single answer. There's no timer unless you want one, and never a penalty for taking your time.

There's plenty to sink into. Dozens of hand-built boards grow from small, gentle grids to large, intricate cross-sum tangles across easy, medium and hard tiers, with your progress and best times saved as you go. A notes mode handles candidates, an undo lets you explore freely, a check highlights any current mistakes, and a limited hint reveals one logically-forced digit when you're genuinely stuck — so the challenge stays fair rather than frustrating.

Wrapped in a big animated title, a crisp palette and buttons styled just for it, Vsota runs completely offline with no account and no ads, in Slovenian and English. Whether you want a five-minute warm-up for your head or a long, meditative solve, it turns a grid of sums into an elegant daily workout for the mind.