The first app probably has better ratings because it's more useful and convenient for its users. People are more likely to use an app that offers them what they want on their phones. The second wouldn't be as successful because it doesn't offer anything new or innovative. As the designer, you should strive to create something that will be loved by your target audience!
When you work with your UX designer, they will figure out how to make your application development as user-friendly as possible. They should be involved in the entire process of the design and application development, from the beginning to the end.
