Firebase Question: On Data Changed

component_event (1)
I don’t want to use this block
If I don’t use this, will it fetch data change updates as it results in user’s internet usage and Firebase costs will increase…

This is just event like add event listener.
If not use then this event is not fire but process is done as always.
If you not use then no effect will apply on firebase usage and internet according to me.

Please give me correct information @Kodular (Kodular Staff)

Read here…