Sum Sudoku - Killer Puzzles

Sum Sudoku — Killer Puzzles is a modern take on the classic killer sudoku puzzle, built for players who love logic, numbers, and the satisfying "click" of a well-placed digit.

Each puzzle combines standard 9×9 sudoku rules with "cages" — outlined groups of cells that must add up to a target sum, with no digit repeating inside the cage. Place numbers 1–9 so every row, column, 3×3 box, and cage is perfectly balanced.

KEY FEATURES

• Multiple difficulty levels — from gentle warm-ups to truly brain-melting challenges
• Daily Puzzle — a fresh, hand-picked puzzle every day to keep your streak going
• Smart pencil marks — toggle candidate notes with one tap, or let auto-notes handle it for you
• Hint system — stuck on a cell? Get a targeted nudge, not a spoiler
• Undo / redo — experiment freely, never lose your train of thought
• Error checking — optional live feedback when your move breaks a rule
• Tutorial — learn killer sudoku from scratch, step by step
• Beautiful, distraction-free design — dark and light themes that adapt to your phone
• Works offline — play anywhere, anytime, no sign-up required

NO LOGINS. NO ACCOUNTS. NO NONSENSE.

Your progress stays on your device. We don't collect personal information or ask you to register. Just open the app and play.

FREE TO PLAY

Sum Sudoku is free, supported by unobtrusive banner ads. No paywalls, no forced videos between puzzles.

WHO IT'S FOR

Whether you're a daily sudoku solver looking for a new twist, a killer-sudoku veteran hunting for a sleek mobile companion, or just someone who enjoys a quiet, logical puzzle with your morning coffee — Sum Sudoku is built for you.

Download now and see how quickly a few cages can pull you in.

---

Questions, feedback, or bug reports? We'd love to hear from you:
https://fiksdit.com/5dls/sumsudoku/support