This is an small tip for people who use firebase database without authentication some.
We know firebase only provides 10gb monthly limit for free account.
For that reason here is an tip to solve that bandwidth problem of your. All you have to do is just make all of your data structures in list format so when you call data you only need to call a single string of data witch can contain multiple values.
Also it’s much more secure because others won’t be able to get what are you exactly doing.