Bulls and Cows Classic 與 Bulls And Cows: Break the code 使用情況與統計

Bulls and Cows Classic app is the iOS realization of well-known logic puzzle game. Classic rules are quite simple.  You have a code of 4 digits. All digits are unique and the 1st digit can't be a zero. Make your guesses by entering different digits. The game gives you hints with number of bulls and cows: - if you have correct digit in correct place then you have a bull - if you have correct digit but in wrong place then you have a cow Good luck!