Yo! Sudoku!

Yo! Sudoku! A sudoku game for beginners and advanced players alike! With unlimited grids on or offline, 5 difficulty levels ranging from "easy" to "diabolical," daily challenges, and a beautiful ergonomic design.
Beautiful themes provided so you can have almost a real experience just like playing paper sudoku games in your garden, in a camping night, ...
You can scan a sudoku game on a paper print and solve it anytime at your convenience.

[Features]
- Fast: no lengthy intros or slow animations.
- Small: doesn't eat up a lot of storage on your device.
- Friendly: big buttons avoid fat-fingering.
- Tips: tips provided when you are out of clues.
- Scan: scan a sudoku on paper prints and play it later at anytime.
- Undo / Redo.