I'd like to present you Captain Question, the first android Genie application:
My name is Captain Question, the Genie from your mobile. At incoming calls I ask you a question that appears in a small bubble, to which I give the answer at the end of the phone call.
• Hundreds of curiosities after call
• Curiosities in 8 different topics and 5 languages
Please go to google play and search with "Captain Question" and download it.