Lucky stars app is a fake app. This app is a quiz app where you can win prises just biding and playinng the quizzes. But I have shared my experience for about 1 week. I have played many quizzes. First they show that I am at the top but when quiz time ends my rank suddenly falls from nowhere. This app is a fake one. They are not giving anything to anyone. They are just fake. They also ask for the money for the coins that you use to play the quiz and partecipate in any contest. I suggest everyone not hot install this fake app