Fivefold vs Sudoku Mashup

Fivefold is a Sudoku-inspired game where the rules change every puzzle. Fill the grid through pure deduction, combining familiar number-placement logic with new rules. It's a game that will never stop giving you those satisfying "Aha!" moments. Enjoy the daily puzzle with your morning coffee, or play a quick, easy puzzle while you're waiting for an appointment. When you're ready, you can move to harder puzzles, like our large 7x7 puzzles that'll give your brain a real workout. We kept Fivefold simple. There are no ads interrupting you, no in-game currencies, and no tricks to keep you playing. The game comes with a ton of free puzzles, and if you want even more, you can buy a puzzle pack. That’s it! We made Fivefold because we love puzzles too. We hope it makes your brain work just a little bit harder, and we hope that you'll enjoy playing it as much as we enjoyed making it! - Matt & Owen

Sudoku, beautifully reimagined. A calm, focused place to solve Sudoku every day — from the timeless 9×9 classic to a growing library of clever variants. No ads, no clutter, no internet required. Just you and the grid. A NEW PUZZLE EVERY DAY Wake up to a fresh, hand-tuned daily puzzle. Free, always. Come back each day, or simply enjoy a quiet few minutes whenever the mood strikes. CLASSIC AND BEYOND Master the classic, then explore a dozen variants that each add one elegant twist: • Killer — cages that sum to a target • Thermo — values rise along the thermometer • Kropki — dots mark consecutive and double neighbors • XV — X and V mark pairs that sum to 10 or 5 • Diagonals — the two main diagonals join the rules • Anti-King and Anti-Knight — chess-move restrictions • Palindrome — lines that read the same both ways • Quadruples — corner clues pin down four cells • Disjoint Sets — matching positions stay unique • No Consecutive — neighbors can't be one apart • Even/Odd — shaded cells fix parity Every variant comes with clear, in-app rules, so you can learn as you play. PACKS FOR EVERY MOOD Start with 30 puzzles built right in — ready to play the moment you install, no download needed. Another 60 free puzzles are available to download today, with new packs added over time. The growing library spans beginner-friendly warm-ups to expert brain-benders. Subscribers can unlock optional premium packs — entirely your choice; the daily puzzle and free packs never go away. SOLVE YOUR WAY • Smart pencil marks, with board-wide candidate fill • Color highlights to trace chains and patterns • A number pad designed for one-handed play • Unlimited undo and redo • Built-in rules and technique guides, plus a cage-combination helper for Killer DESIGNED TO DISAPPEAR A clean, modern interface that gets out of the way. Thoughtful typography, soft colors, and smooth, responsive input — tuned for iPhone. NO ADS. FULLY OFFLINE. PRIVATE. No banners, no pop-ups, no interruptions, ever. Everything works without a connection, so you can solve on a plane, a train, or anywhere at all. Your progress stays on your device. OPTIONAL PREMIUM Love the app and want more puzzles? An optional subscription unlocks premium packs and supports ongoing development. The core experience — a daily puzzle, free packs, every variant, and no ads — is yours for free. Download now and start today's puzzle. EULA : https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy : https://games.isak.tech/privacy Support : https://games.isak.tech/support