SudokuSpire vs Sudoku Clear

Sudoku Spire turns the world's favourite logic puzzle into a roguelike climb. Every board is a fresh, hand-checked sudoku with exactly one solution — fill each row, column, and box, then climb the branching Spire to the next. But now a wrong number costs health, and running out ends the run. The calm of pure deduction, finally with stakes and a reason to dive back in. FAIR BY DESIGN There is no luck here. Every board is procedurally generated and verified to have a single solution, so you can always reason your way to the answer — never guess. Relics change the math in your favour; they never replace deduction with chance. RELICS THAT BEND THE RULES Clear boards to claim relics and stack a build that's yours alone: - Lantern reveals correct cells at the start of every board - Surveyor's Glass hands you a full solved box - Aegis Charm forgives your first mistake - Jeweler's Loupe auto-fills your candidate notes - Second Wind pulls you back from a lethal slip, once per run No two ascents play the same. CLIMB, FALL, CLIMB AGAIN Boards grow from a gentle 4×4 up to full 9×9, and Wardens at each milestone fight fair but hard — deducing from fewer clues, on bigger grids, or with your notes disabled. Every board you clear banks Shards, even on a failed run, to spend on permanent upgrades: more health, a starting relic, richer rewards. You always climb back stronger. SUDOKU SPIRE PRO (one-time purchase) - Removes all ads - +1 maximum health every run - A free Heartstone relic at the start of every run - +25% Shards from every board Free players can unlock all Pro perks for 30 minutes by watching a short video — and revive once per run the same way. Sudoku Spire shows non-personalized ads only and does not track you across other apps. If you love sudoku but always wished a single solved board led somewhere — this is your climb. Read the grid. Reach the summit.

Sudoku Clear is a focused 9x9 Sudoku app built for readable solving. Fill each row, column and 3x3 box with the numbers 1-9. Start with Levels Play 4,381 numbered levels. Complete a level to unlock the next, replay completed levels, and return to your saved puzzle. Choose Free play Pick Easy, Medium or Hard outside the level sequence. Free play and Levels keep separate saved games on this device. Free play also records local solved counts and best times by difficulty. Tools for focused solving - Row, column, box and matching-number highlights - Pencil notes in fixed positions - Erase, Undo and Redo - Optional mistake highlighting and remaining-number counts - Optional hiding of completed number keys - Optional haptics and key sounds - A quick rules guide No account is required. Progress is saved on this device, without cloud sync. The app includes banner advertising, with no full-screen ads during puzzles. Advertising privacy options appear in Settings where available.