To create a subscription app that will bring you stable income, you will need to define the subscription app model that will give users monthly/yearly application access for a fixed price. In turn, app creators have to continually work on customer retention as well as update their brainchild. The USA revenue shows that more and more online shoppers are switching to the subscription model. This way, last year alone, their number grew by 15%. Subscription growing popularity is a natural process, and it is easy to explain. First of all, it is convenient for customers: instead of buying the same things/services once a month, they simply pay money and get that stuff on the go. Those who have already appreciated delights of a subscription are not limited to one: more than half of online shoppers have at least two of them.