# Lazy Sudoku — Solve Smarter, Not Harder > Solve Smarter, Not Harder (iPhone/iPad app by Sergei Fedorov.) - Source: https://appshunter.io/ios/app/lazy-sudoku/id6755763187 (this page in markdown: same URL + `.md`) - Developer: [Sergei Fedorov](https://appshunter.io/developer/1856184286) - Category: Games, Education, Board, Puzzle - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 15.5 · 203 MB - Languages: Arabic, English, Finnish, French, German, Hebrew, Hindi, Indonesian, Japanese, Korean and 4 more - Released: 2026-01-14 - Data updated: 2026-08-21 - User reviews in markdown: https://appshunter.io/ios/app/lazy-sudoku/id6755763187/reviews.md ## What is Lazy Sudoku? Lazy on the notes. Sharp on the logic. A clean, ad-free Sudoku that takes care of the bookkeeping so you can enjoy the puzzle. Pencil marks update themselves. Hints show you where to look when you're stuck. Classic 9×9 or Diagonal Sudoku — relax with an easy one, or take on something harder. FEATURES • Automatic pencil marks — notes stay current while you play • Helpful hints — three levels, from a gentle nudge to a step-by-step walkthrough drawn on the grid • Classic Sudoku and Diagonal Sudoku (X-Sudoku) — both diagonals join rows, columns, and boxes as rules • Five difficulty levels — Easy through Diabolical, with curated puzzles in each • Three modes — Relaxed for clean play, Standard for everyday solving, Deep when you want every tool • Scan puzzles with on-device OCR — newspapers, books, printed sheets • Create your own — paste from anywhere, or build with live validation • Save multiple games per difficulty — pause and pick up any time • Track your progress — solved counts, time, personal bests • Made for Apple Pencil — handwriting, pressure-sensitive paper mode, hover support on iPad • Native on iPhone and iPad HINTS THAT ACTUALLY TEACH Most "teaching" sudoku apps name the technique and call it teaching. Lazy Sudoku walks you through it. Step-by-step spotting shows you where to look. Step-by-step eliminations show you why the move works. Drawn on the grid, explained in plain English. Get unstuck without being told the answer. AD-FREE, ALWAYS No ads. No banners. No interruptions. Just Sudoku. We do the bookkeeping. You do the thinking. Lazy on the notes. Sharp on the logic. EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Lazy Sudoku Pro | $17.99 | per year | | Lazy Sudoku Premium | $24.99 | per year | | Lazy Sudoku Premium | $3.99 | per month | | Lazy Sudoku Pro | $1.99 | per month | | Lazy Sudoku OCR | $8.99 | per year | | Lazy Sudoku OCR | $0.99 | per month | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Diagonal (X) Sudoku - Gentle | $1.99 | one-time | | Diagonal (X) Sudoku - Moderate | $1.99 | one-time | | Diagonal (X) Sudoku - Tough | $1.99 | one-time | | Diagonal (X) Sudoku - Diabolical | $1.99 | one-time | | Diagonal (X) Sudoku - Extreme | $1.99 | one-time | | Diagonal (X) Sudoku - 12 Clues | $4.99 | one-time | | Diagonal (X) Sudoku - All | $8.99 | one-time | | Lazy Sudoku Pro - Lifetime | $49.99 | one-time | | Lazy Sudoku Premium - Lifetime | $69.99 | one-time | ## Version history (last 5 releases) ### 1.0.4 — 2026-06-21 New in this version: • Diagonal Sudoku (X-Sudoku) — both diagonals join rows, columns, and boxes as ninth-rule units. First-game tutorial, OCR auto-detect, full share-and-print round-trip. • Relaxed Mode gets a tutor — Explain narrates why a digit goes where it does, not just what to place. • Shadow Notes — faint ghost candidates show what's possible in a cell without cluttering your grid. • Sharing and Print — Copy and Get PDF actions in the share dialog, and the printed PDF includes your pencil marks. • Paper Mode deepens — Full Paper as a feel rather than a mode, naked-single hints one at a time, clearer pressure feedback. • New techniques — Fireworks, Bowman's Bingo, Aligned Pair Exclusion, Pattern Overlay Method, Remote Pair. They surface in hints and the picker when they apply. • Watched Techniques — mark a rare pattern and the app flags it the moment it shows up in a scan. ### 1.0.3 — 2026-05-11 New in this version: • Three profiles — Relaxed for clean play, Standard for everyday solvers, Deep for the full toolkit, switch any time • 3D cube view — see the puzzle on a rotating cube and spot patterns from new angles • Sudoku Spaces — project the grid into row × digit, column × digit, and box × digit views, where hidden patterns become obvious • Paper Mode — immersive stylus solving that feels just like pen and paper, with adaptive hints as your notes grow • Statistics — track puzzles solved, time played, technique mastery, and personal bests • Smarter hints — clearer explanations, refined chain visuals, instant re-scans via background caching • Editor and Power Notes — stylus support in the puzzle editor, faster candidate management, puzzle shuffling ### 1.0.2 — 2026-02-18 New in this version: • Apple Pencil Pro — squeeze to open contextual menu, barrel roll support • Contextual radial menu — quick access to actions, digit filtering, selection tools, and strong links display • Better multi-cell selection — select cells directly with stylus, no need to switch to finger • New languages — Indonesian and Portuguese • Interface documentation — updated and translated to all supported languages • Scanner and UI improvements ### 1.0.1 — 2026-01-26 New in this version: • Candidate visibility settings — adjust opacity for a cleaner grid view • Stylus improvements — hover-to-select in value mode, configurable stylus actions • New languages — Finnish, Hebrew, Hindi, Chinese, Arabic, Korean, Japanese, Russian, French, and German ### 1.0 — 2026-01-14 No release notes. ## Related topics [sudoku dark mode](https://appshunter.io/ios/topics/sudoku-dark-mode) --- *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 2026-08-21.*