# Sudoku Mashup — Killer, Thermo, Kropki & more > Ad-free Sudoku app with classic and variant puzzles, daily challenges, and offline play. (iPhone/iPad app by Isak Karlsson.) - Source: https://appshunter.io/ios/app/sudoku-mashup/id6769844640 (this page in markdown: same URL + `.md`) - Developer: [Isak Karlsson](https://appshunter.io/developer/1785308760) - Category: Games, Entertainment, Board, Puzzle - Price: Free with in-app purchases - Rating: 5.00/5 from 2 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 17.0 · 84 MB - Languages: American English - Released: 2026-06-08 - Data updated: 2026-08-27 - Monetization: freemium - User reviews in markdown: https://appshunter.io/ios/app/sudoku-mashup/id6769844640/reviews.md ## What is Sudoku Mashup? 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 ## Key features - Daily Sudoku puzzles - Classic and variant Sudoku types - Killer, Thermo, Kropki, XV, and more variants - Curated puzzle packs - Offline play - Smart pencil marks - Unlimited undo/redo ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Premium Monthly | $0.99 | per month | | Premium Yearly | $9.99 | per year | ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/sudoku-mashup/id6769844640/reviews.md ### 5/5 — Clever puzzles *2026-06-10* Pleasantly hard puzzles and easy to use once you get the hang of it ### 5/5 — So much more fun than playing on paper *2026-06-09* All the features and all the Sudoku variants. This is a solid app without any loose ends and rough edges like one would expect from most free apps. Even small stuff like putting the wrong number twice in a set and getting immediate feedback makes gameplay really fun ## Frequently asked questions about Sudoku Mashup ### What makes Sudoku Mashup different from other Sudoku apps? Sudoku Mashup offers a wide array of unique variants beyond the classic 9x9 grid, such as Killer, Thermo, and Kropki. It also boasts a clean, ad-free interface and full offline functionality, providing a focused solving experience. ### Does Sudoku Mashup have ads? No, Sudoku Mashup is completely ad-free. The developers emphasize a distraction-free solving experience with no banners or pop-ups, ever. ### Can I play Sudoku Mashup offline? Yes, Sudoku Mashup is fully offline. Everything works without an internet connection, allowing you to solve puzzles on a plane, train, or anywhere else. ### What Sudoku variants are available in Sudoku Mashup? Sudoku Mashup features a growing library of variants including Killer, Thermo, Kropki, XV, Diagonals, Anti-King, Anti-Knight, Palindrome, Quadruples, Disjoint Sets, No Consecutive, and Even/Odd. Clear rules for each variant are provided in-app. ### How often are new puzzles added to Sudoku Mashup? A fresh, hand-tuned daily puzzle is available every day for free. Additionally, there is a growing library of curated puzzle packs to explore. ### What are the subscription options for Sudoku Mashup? Sudoku Mashup offers optional premium subscriptions for access to more puzzle packs. Plans include Premium Monthly at $0.99 and Premium Yearly at $9.99. The core experience, including the daily puzzle and free packs, remains free. ### What devices is Sudoku Mashup available on? Sudoku Mashup is designed for iPhone and iPad, offering a clean, modern interface tuned for these devices. ### How does Sudoku Mashup handle user progress? Your progress in Sudoku Mashup stays on your device. The app prioritizes user privacy and does not require an internet connection for saving your game progress. ## Version history (last 5 releases) ### 2.0.8 — 2026-08-11 Sudoku Mashup 2.0 — the biggest update yet. FOURTEEN NEW VARIANTS Arrow, Sandwich, Magic Square, Battenburg, Renban, German Whispers, Between Lines, Zipper Lines, Region Sum Lines, Entropic Lines, Modular Lines, Parity Lines, Ten Lines, and Twelve Lines. Every one ships with a playable intro puzzle and its own rules card, and each line variant has a distinct color so overlapping lines stay readable. New-variant packs and dailies roll out over the coming weeks. FASTER WHERE IT COUNTS Found and fixed the true cause of the mid-play stall when placing or erasing pencil marks — auto-save was freezing the game for a beat, and it grew worse the more puzzles you'd ever played. Saves are now split per puzzle, so saving stays instant no matter the size of your collection, and the board renders at your screen's full refresh rate while you're actively tapping. REMEMBERED, EVERYWHERE Undo history is now saved for every in-progress puzzle — switch between puzzles freely and each keeps its full trail. The killer-cage combos calculator remembers everything across restarts: digit filters, crossed-off combos, and your A/B/C slots. RULES CARDS STATE THE RULE Every variant's rules card now tells you just the rule — the deductions are yours to make. ### 1.6.2 — 2026-07-01 The 1.6 series makes a growing puzzle library easier to navigate — and the app quicker and tidier. FIND THE RIGHT PACK FASTER The Packs screen has two new filters. Show only the packs you've installed — or only the ones you haven't yet — and hide the packs you've already finished, so a long collection stays easy to browse for your next puzzle. A TIDIER HOME The home screen is calmer: the guided lessons now live in a single Learn card, without the extra floating reminder. A QUICK WAY TO RATE Enjoying Sudoku Mashup? A new "Rate it" row in Settings jumps straight to the App Store review page — no pop-ups, just there when you want it. SNAPPIER PENCIL MARKS Fixed a brief delay that could make placing pencil marks feel laggy — taps now register instantly. ### 1.5.12 — 2026-06-25 The 1.5 series brings guided learning, smarter help, and sharper, faster solving tools. LEARN, HANDS-ON New guided lessons teach sudoku from the ground up — row, column and box basics, pattern techniques like the X-Wing, thermometers, and boards where variants stack. Every lesson is hands-on: you pencil the candidates, erase the ones a pattern rules out, and place the digit it proves. Finish the last lesson and jump straight into a beginner classic to put it to work. SMART HINT Stuck? Tap Smart Hint and the game finds the next technique the board is actually asking for — it names the technique, highlights the cells in play, then spells out the exact move. It works across every variant, and reveals a single cell when there's no clean next step, so you're never truly stuck. When rules overlap — Non-Consecutive meeting XV or Kropki — the rules sheet now flags where they collide, nudging you toward what each marker can be. PENCIL MARKS, YOUR WAY Load the digits you want (say 2, 4, 6, 8), then press-and-hold a cell to set its candidates to exactly those — overwrite a cell's marks in one gesture. With Multi on, a hold lays every loaded digit across the board at once. And you can now give each pencil layer its own color: set separate shades for your top, center, and bottom marks per theme, while the layers you're not working in gently dim so the active one stands out (Settings → Appearance). COLOR & HIGHLIGHTS The color highlighter's radial menu previews your full set of staged colors, and a long-press lays them all down at once with Multi-color on. The radial number picker previews matching same-digit cells as you aim, with a haptic tap. PLAY YOUR WAY Prefer to solve without a clock? New settings let you hide the in-game timer and the times shown in menus — your solve times are still recorded, so it's purely about what you see. SMOOTHER ON BUSY BOARDS Pencilling stays smooth even on the most crowded boards. Adding or clearing a candidate no longer redraws the whole grid, so dense puzzles and variant boards packed with marks keep up as you fill them in. POLISH & FIXES • When two line rules share cells — like a palindrome and a thermometer — both now show as nested bands instead of one painting over the other, so you can still trace each. • Guided lessons float their prompt over the board instead of shrinking it, and stay clear of the notch on newer iPhones. • The grid frame no longer drew off the screen edge on variants with longer names. • Solved puzzles keep their final time when you reopen them; restarting still counts from zero. • Palindrome puzzles no longer mis-highlight a line's cells or hide a digit a mirrored cell needs. • Fixed the Combos calculator popping open when you tapped a Killer cage with the Delete tool selected. • Fresh boards no longer open with the top-left cell pre-selected. • The Packs browser's variant filter now works, and its filter menu reads more cleanly. ### 1.5.6 — 2026-06-16 The 1.5 series brings guided learning, smarter help, and sharper solving tools. LEARN, HANDS-ON New guided lessons teach sudoku from the ground up — row, column and box basics, pattern techniques like the X-Wing, thermometers, and boards where variants stack. Every lesson is hands-on: you pencil the candidates, erase the ones a pattern rules out, and place the digit it proves. Finish the last lesson and jump straight into a beginner classic to put it to work. SMART HINT Stuck? Tap Smart Hint and the game finds the next technique the board is actually asking for — it names the technique, highlights the cells in play, then spells out the exact move. It works across every variant, and reveals a single cell when there's no clean next step, so you're never truly stuck. FASTER PENCIL WORK In pencil mode, load the digits you want (say 2, 4, 6, 8), then press-and-hold a cell to set its candidates to exactly those digits — overwrite a cell's marks in one gesture. PLAY YOUR WAY Prefer to solve without a clock? New settings let you hide the in-game timer and the times shown in menus — your solve times are still recorded, so it's purely about what you see. POLISH & FIXES • Guided lessons now float their prompt over the board instead of shrinking it, and stay clear of the notch on newer iPhones. • The grid frame no longer drew off the screen edge on variants with longer names. • Solved puzzles keep their final time when you reopen them; restarting still counts from zero. • Palindrome puzzles no longer mis-highlight a line's cells or hide a digit a mirrored cell needs. • Fresh boards no longer open with the top-left cell pre-selected. • The Packs browser's variant filter now works, and its filter menu reads more cleanly. ### 1.14.15 — 2026-06-11 This update rolls up four releases of solving upgrades: • Killer puzzles: tap inside a cage to open the Combos calculator, pre-set to that cage's size and total. Each cage keeps its own Must/Cannot picks and crossed-off combos. • Variant rules up front: opening a variant for the first time shows its rules sheet automatically (switch off in Settings → Gameplay → Help). • Pen·Auto, simplified: a cell down to a single pencil mark always resolves on tap — and no longer conflicts with Delete. • Restart now asks you to confirm, so an accidental tap can't wipe a solve. • Thermometer puzzles draw from longer, more varied thermo shapes. • Quads can now call for four matching digits. • Daily mashups now name every variant they include. ## More apps by Isak Karlsson - [Zen Brick](https://appshunter.io/ios/app/zen-brick/id6739436756) - [Bitmerge](https://appshunter.io/ios/app/bitmerge/id6786763002) - [Flowfield: Neon Fluid Sandbox](https://appshunter.io/ios/app/flowfield-neon-fluid-sandbox/id6794878591) All apps by Isak Karlsson: https://appshunter.io/developer/1785308760 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*