In many ways, 2017 was an exciting year when it comes to mobile apps development and marketing. Mobile apps graduated from being an optional investment to a necessity and now companies cannot simply afford to lose on sizable revenue generated by them. The number of free apps downloaded stands at mind-boggling 254 billion, which is enough to ring some bells. An important question to be asked here is that how is mobile app marketing shape up in the year 2018? Here is a detailed look at the trends to watch out for.