We're tracking our web apps using GTM (Google Tag Manager) and GA360 (the paid version of GA).
We also have hybrid mobile apps (mobile apps built with web frontend) that are intended for our users to work mostly offline (they are kind of reader apps). I've been doing some research and there's a lot of information but I'm not sure yet of what's the best approach to connect my mobile apps to GA when they're mostly offline.
I've found Google Analytics for Firebase which is a free service but seems to be a separate service from GA and I would end up with half of the analytics in GA and the other half in Firebase.
I also read about using Workbox to support Offline Google Analytics: https://developers.google.com/web/tools/workbox/guides/enable-offline-analytics
What's actually the best approach for this kind of problem? What service(s) can I use to solve this problem?
Thank you.