Is it possible to implement the below schema on free firebase?

Question

firebase

I have 3 android applications. Then I plan to add more. I would like to combine them into one ecosystem. I need to create a common database of users for all applications. In addition, each application requires its own database (static, will only be changed manually from the firebase console), and each user in each application has its own realtime database (for example, request history). What tools are better to use for this, and most importantly, can this be done on a free plan? I must say right away that the size of all databases taken together is unlikely to exceed even 10 MB.

Answer 1

I advise you to get acquainted with this read:
https://habr.com/ru/company/productivity_inside/bl...
Be careful with this decision.
About six months ago, for similar reasons, I had to switch to Node + MongoDB / leaving only authorization and analytics.