Why do you think uber came out? Why do you think mobile apps were invented in the first place? Well everything that happens, it happens for a reason. The reason behind the making of uber was the fact that there was a gap in the market which allowed the developers to make good use of it. You can also create an android app like uber nowadays quite easily but now your reasons will be different than the developers before you. You are creating the app to give competition to a brand that is already existing and they simply launched the service to fill the gap in the market, do you agree?