If you are interested in birds, try our Android bird guide for the European countries, Bird Guide Europe.
In our suite of quizzes for Android we make Film Quiz: Movie Quotes for film lovers and Bird Quiz: Nordic Birds for bird lovers. We also make the Swedish quizzes History Quiz: Svenskar about Swedish history and Geography Quiz: Sverige for those interested in the Swedish geography.
If you want to know what happens when you combine memory with mathematics, you should check out Math Puzzle: Memomatics. A mind-boggling game for the Android platform.