A calm, modern Sudoku game for players who enjoy solving at their own pace.

Lab Sudoku brings together a clean, highly customisable board, a wide range of puzzle difficulties, thoughtful solving tools, and optional guidance when you want to learn rather than simply reveal an answer.

Play Your Way

Start a fresh puzzle across five difficulty levels, from Simple through to Diabolical. Continue unfinished games whenever you are ready, browse your active puzzles, and keep track of the puzzles you have completed.

Every game is designed to stay out of your way: no pressure to race, no need to be online to solve a regular puzzle, and no artificial limits on the core Sudoku experience.

A Board That Fits You

Make the board feel right for you with detailed display and interaction settings:

  • Choose from light, dark, and AMOLED-friendly colour themes.
  • Select number fonts, grid styles, cell shapes, candidate layouts, and number-button styles.
  • Adjust the board size and position to suit your device and grip.
  • Choose one or two rows for the number pad.
  • Configure timers, screen sleep behaviour, highlights, animations, and stylus hover feedback.

Lab Sudoku remembers your preferences, so your next puzzle opens the way you like to play.

Helpful Tools, When You Need Them

Use candidates to work through possibilities, undo and redo moves, validate the board, restart a puzzle, or automatically fill valid candidates.

For more deliberate solving, checkpoints let you save a named point in a puzzle before trying a difficult branch. Restore a checkpoint later and explore a different path without losing your progress.

Learn the Logic

Lab Sudoku includes guided solving support that focuses on the reasoning behind a move. Depending on the board, guided hints can help identify techniques such as singles, pairs, box-line interactions, wings, and fish patterns.

The goal is not just to give an answer. It is to help you recognise the next logical step and build confidence with more advanced Sudoku techniques.

Your Puzzles, In One Place

Bring puzzles into Lab Sudoku your way:

  • Enter a puzzle manually with a fast, purpose-built entry board.
  • Save your custom puzzles in your personal library.
  • Import a printed or on-screen Sudoku with camera scanning and review the recognised grid before starting.

Imported puzzles can be resumed, bookmarked, organised, and solved alongside the built-in catalogue.

Daily Challenge and Progress

Take on a new Daily Challenge and return to previous daily puzzles you unlocked while they were available. The home screen keeps your recent games, puzzle progress, and custom puzzle library within easy reach.

The statistics area provides a clearer picture of your playing history, including completed puzzles, difficulty progress, solving activity, and trends over time.

Lab Sudoku Premium

Lab Sudoku is free to play. A single, optional Premium purchase unlocks additional features, including:

  • Guided Hints for learning logical solving techniques.
  • Camera puzzle import.
  • Premium neon themes and future Premium visual options.

Premium is a one-time purchase, not a subscription. Core Sudoku play, manual puzzle entry, standard themes, and the main puzzle catalogue remain available without it.

Built for a Better Sudoku Session

Whether you have five minutes for a daily puzzle or want to spend an evening working through a Diabolical grid, Lab Sudoku is built to make the puzzle the focus.

Download Lab Sudoku and make your next Sudoku session your own.