> We use Apple's location service, not beaconDB.

I stand corrected. Do you have plans to switch to BeaconDB when the coverage in the USA improves?

We're building our own fully offline implementation. Our existing implementation is semi-offline and does the position estimation locally based on downloading data kept in an in-memory cache for a limited time. We're close to what's needed for offline support already in that sense. We need to finish scraping the data and putting together a system for distributing and using it.