Sudoku 2Go Free

Sudoku 2Go with 10'000 puzzles, 10 different variants, 5 levels of difficulty and a world-class hint engine. All the Sudoku you'll ever need!
In addition to the standard Sudoku puzzles it offers these Sudoku variants:
- X-Sudoku
- Hyper-Sudoku
- Percent-Sudoku
- Color-Sudoku
- Squiggly Sudoku (a.k.a. Jigsaw Sudoku) and combinations thereof (e.g. Sudoku-X with jigsaw regions)
Features:
- 10 different game variations
- 5 levels of difficulty per game variation
- 200 puzzles per game variation and difficulty level
- Puzzle timer
- Auto-save
- Statistics
- Cell highlighting
- Undo/redo
Permissions:
- Storage: this permission is used to store/retrieve the Sudoku puzzles in play
- Network Communication: this permission is used by ad networks to retrieve ads
- Billing: this permission is needed to offer the possibility for to remove ads using an in-app purchase
Hint Engine:
- Full House
- Hidden Single
- Hidden Subset (Pair, Triple Quad)
- Naked Single
- Naked Subset (Pair, Triple Quad)
- Locked Candidates (Pointing Claiming)
- X-Wing (Regular, Finned Sashimi)
- Swordfish (Regular, Finned Sashimi)
- Jellyfish (Regular, Finned Sashimi)
- XY-, XYZ-, WXYZ-, VWXYZ-, UVWXYZ-, TUVWXYZ-, STUVWXYZ-, RSTUVWXYZ-Wing
- W-Wing
- Almost Locked Candidates (Pair, Triple Quad)
- Avoidable Rectangle (type 1 2)
- Hidden Unique Rectangle
- Uniqueness Test (type 1, 2, 3, 4 5)
- BUG 1, BUG 2, BUG 3 and BUG 4
- Aligned Pair Triple Exclusion
- Sue de Coq
- ALS-XZ, ALS-XY-Wing
- Remote Pairs
- Bidirectional Cycles
- Forcing X-Chains
- Forcing XY-Chains
- Nishio Forcing Chains
- Double Forcing Chains
- Contradiction Forcing Chains
- Region Forcing Chains
- Cell Forcing Chains