Sudoku-Daily Sudoku Challenge

About this app

SudokuFang — the sudoku that explains every step. Stuck? Hints don't spoil: they name the technique, frame the area, and reveal layer by layer until you crack it yourself. Found a hard puzzle in a book or online? Photo-import it for an instant rating and a fully explained solve path. [Hints That Teach] Five layers of reveal: technique → area → candidates → eliminations → full explanation. Each layer tells you a little more; the answer stays yours to find. Every hint links to the technique's full lesson — learn as you play. [Any Standard Sudoku, Explained] Import by camera, by hand, or by paste: · Checks for no solution, a unique solution, or multiple solutions · Rates difficulty (ER + score) with a technique breakdown · Generates a complete solve path — every placement and elimination justified · Explore alternative moves at any step, or long-press a candidate to test a hypothesis · Export your solve as a GIF, a long image or a difficulty report [70+ Techniques, Taught Properly] From basic eliminations and pairs to chains, fish and beyond — each with theory and worked examples. Five theory courses read like an illustrated textbook; the learning path mirrors the seven game difficulties, and what you learn shows up in your next hint. Generate practice puzzles that target any technique. [A Fresh Goal Every Day] · Daily Challenge: the same puzzle worldwide, medal calendar, same-month make-up days · Library campaign: seven difficulty tiers, plus your own collections · Score leaderboards and head-to-head races on the same puzzle (online) [New Rules, New Fun] 20 sudoku variants: Killer, Diagonal, Jigsaw, Windoku, Thermo, Kropki, Sandwich, Skyscrapers and more — each with four difficulty levels, full notes, annotations and highlighting. [The Small Things] Auto-candidates, 10-color annotations, chain drawing, solve replay, 14 themes, dark mode, iCloud sync. No ads. Open the app, and it's just sudoku. Whether it's your first puzzle or you're deep into chains and fish, SudokuFang is here to explain the next step.

[Big] Variant Sudoku: from 3 to 20 variants • New: Windoku, Center Dot, Anti-Knight, Anti-King, Even-Odd, Consecutive, XV, Kropki, Thermo, German Whispers, Renban, Palindrome, Between Lines, Sandwich, X-Sums, Skyscrapers and Little Killer • Four difficulty levels for every variant, with a fully retuned difficulty curve — Medium bites, Hard means it • Killer Sudoku board redrawn: cage sums moved onto the cage corner so candidates are never covered [New] Variants now play like the classic game • Notes, auto-candidates, pause, error checking, stats and results — all there • 10-color annotations, chain drawing, elimination marks and board snapshots now work in variants too • Stuck? Reveal the selected cell's answer [New] Tap a number, light up the board • With no cell selected, tap a keypad number to highlight every placement and every candidate of that number at once [New] Turn a photo into a theme • Generate a custom theme from any photo, with 30 fine-tune options • New in-game palette: brightness, font size and highlight styles, one tap away [Improved] • New "chip" style for candidate highlighting • Weekly leaderboard scoring fix • Many interface refinements and stability fixes

Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.

1. First observed Aug 24, 2026 · 12:21 PM Free