Without statistics, you will have little to no feedback. You will be blind to all insights you could otherwise have obtained from your users and their behavior. Do not release your app without any implementation required for obtaining analytical data:

In general, statistics could inform us about the following:
- User acquisition performance
- User behavior and conversion
- User demographics
- User behavior by segment or cohort
- Financial insights
So, the right statistics tell us something about app usage. It gives an answer to questions such as: How well is the app doing and what exactly does "doing well" mean? Is this about the number of downloads? The number of active users? The number of daily new users? It is important not just to have statistics, but to have actionable metrics. It is easy to gather a lot of data. It is more difficult to determine...