A free program for Android, by Blue Boat Co. Ltd..

1 Crossword is a game that will let you learn a lot of new words, and it’s all for free. You’ll be able to play it offline and on your mobile device. All you have to do is guess the word that fits into this unique mini crossword. There are a lot of different levels and they’re all based on the same theme. So you’ll be able to learn a lot of new words and get better at guessing words.

The game is really easy to play and you don’t have to do anything special. You just have to start playing and have fun.