Fixed Android 5.0+ Crash Bug.
Add More Features.
**$$$$$$$$ All coins in app are FREE $$$$$$$$**
**All levels are FREE**
Sudoku Free is really simple sudoku.
It is easy to learn but a challenge to master, puzzling players all over world.
Test your powers of observation and memory.
Fill it as fast as you can, challenge it！
Features,
***4 difficulty models;
***Smart hints;
***Error checking automatically;
***Share it with your friends.
