Mastermind Word Game Ultimate Edition - The Ultimate Word Puzzle Game for all ages.The app covers 50000+ words.
Google Play - https://play.google.com/store/apps/details?id=com.SmartGamesFunLab.MastermindWordGameUltimateEdition
Amazon - http://www.amazon.com/Mastermind-Word-Game-Ultimate-Edition/dp/B00ZO3KW0Q/
You attempt to guess the 4 letter word the device has chosen. The response to your guess will tell you which characters in the word you guessed are present in the secret word, and which one of them are in the right spot.
Game rules: (from http://en.wikipedia.org)
Bulls and Cows – also known as Cows and Bulls or Pigs and Bulls or Bulls and Cleots – is an old code-breaking paper and pencil game.
Google Play - https://play.google.com/store/apps/details?id=com.SmartGamesFunLab.MastermindWordGameUltimateEdition
Amazon - http://www.amazon.com/Mastermind-Word-Game-Ultimate-Edition/dp/B00ZO3KW0Q/