How to share the bank with two android apps?

Hello, I have 3 apps, one does insert into the database and another shows a list of those data (do not ask me why this idea) and I needed a third one to show a count of records in a table from that database.

It turns out that in the latter the count returns zero even though the second app shows items in the list.

I've been told that I might need to share contexts between apps, but how do I do that?

EDIT: Have already left in the comments that this is not the best option, then how to access database data from another app?