Need ideas for a app.

Sorry to disturb u people. I have recently been learning android app developing and have made some games and some usual apps like calculator and that stuff. but now i am thinking of developing something useful(free of cost and useful for the people). So need some ideas. i had thought of making a bus schedule recorder for my region people but the buses are so out of time that it is not practicle.

So what would you suggest. It should be a bit unique and mostly focused on the local use like for indian people. I dont care if it only relates to a few hundred people. I will be happy even if it makes life of 30-40 people easy. I am rather a good programmer  but new to the android platform so want to keep it simple yet powerful. Thank You.