Just Sudoku

JUST SUDOKU Just Sudoku is a Sudoku collection from Nonnie Games built for calm, clear play: a full grid on screen, a simple keypad, and room to think. No ads, no subscriptions, no streaks, and no hint currencies. CLASSIC SUDOKU Fill each row, column, and box so every digit appears once. Play 4×4, 6×6, and 9×9 grids at Easy, Medium, Hard, or Expert on 9×9. Tap Change puzzle whenever you want a fresh board. VARIANT COLLECTION The same comfortable controls work for every type; only the rules change. • Diagonal — Classic 9×9, but both main diagonals must also contain 1–9 once each. • Jigsaw — Rows and columns as usual; irregular regions replace the usual 3×3 boxes. • Killer — Cage sums on the grid: digits in each cage add to the clue and do not repeat inside the cage. • Thermo — Classic 9×9 plus thermometers: numbers increase from bulb to tip along each tube. • Wordoku — Letters A–I instead of digits; some puzzles hide a nine-letter word to discover when you finish. How to play in the app explains each type in plain language before you start. HINTS AND LEARNING Hints are unlimited and never count against you. • Nudge — Highlights where to look next (a row, column, region, or cell). • Explain — Describes a valid logical step in plain English, matched to the puzzle type you are playing. • Reveal — Fills the selected cell when you are stuck (optional confirm in settings). Turn on Guided play in Settings and the app quietly points you toward the next cell you can solve by logic—without giving away the answer. Use pencil notes, auto notes, and smart notes to work like pen and paper; smart notes drop candidates when you place a digit. Unlimited undo and redo are always there when you change your mind. HOW YOU PLAY • Standard — Everyday Sudoku at the difficulty you choose. • Gentle — Straightforward deductions only; mistake feedback stays on; timer hidden. • Quick Finish — Most cells already filled for a short session to the end. COMFORT AND FOCUS Large digits and a grid-first layout keep the puzzle in focus. Optional high contrast, highlighting for rows, regions, and matching digits, and a left-handed keypad option help you scan the board your way. Choose a table background, or a new one each game. The timer is optional and off by default. Progress saves automatically; play offline. Classic Sudoku is free to play without limits; Just Sudoku Pro unlocks the variant types above. Sudoku your way—from your first 4×4 to Killer cages and thermometer chains—at your own pace.