When you talk about why some mobile apps have a large volume of users all over the world while there are some mobile apps that have very few or no users at all. Why is it so? Why is it that taxi apps have so many users? So, I found this out when I wanted to learn how to create a taxi app myself. I discovered that before making any mobile app the first part or step of the process is to find out the need of the users. So, looking at the demand and usage of the taxi booking apps it is apparently clear that mobile apps that provide services that are highly useful are more likely to have a larger user base. What other reasons might be there?