Summary

This chapter is an outstanding exercise intended to show the power of the Firebase Realtime Database, to store and manage data in the list format including saving, erasing, and furthermore, looking for list items. This has included the use of the push() method for the DatabaseReference class with the Query class and both value and child event listeners. We have also understood database rules, and we have built an application using all this knowledge that helps blood seekers by connecting to blood donors.