Sqlite online direct management from app

Hi everyone, I’m looking for ways to have online databases my apps point to. Not being able, for now, to maintain times and costs of a host with mysql, I was thinking of a simpler and cheaper solution.
It would be ideal if you found a way to have several Sqlite databases online and manage them directly from the app.
So I need to envy:

  1. A host that manages sqlite online, free or at low cost
  2. The method by which to read and write directly on the online database.

Probably the solution to my request could be firebase, but I still have to understand the logic of database management with firebase. I am used to relational databases, so I would like to work with Sqlite.

Greetings and good day to all.