crispert

I placed the entities which are most frequently deleted in a separate BoxStore and when this reaches a certain size, the entities in it are sent to server and the...

Yes, indeed, the size of the BoxStore is stable, when some entities are deleted and new ones are saved the size remains constant, so there is absolutely no problem with...

Reuse of space previously occupied by deleted entities is more of an observation, not an advertised feature of the platform and it's probably a best effort attempt, not a guarantee....

@LeoK987 You can build several instances of BoxStore which represents a database in Objectbox terms: MyObjectBox.builder() .androidContext(appContext) .name("your_store_name") .build(); Just be careful to give a unique name to each one....