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I have a KMM mobile app focused on regional food delivery. We built it entirely on MongoDB, utilizing Auth, Realm Device Sync, and Triggers. Unfortunately, many of these features will soon be deprecated.

What should I migrate to?

I’m considering Firebase, but I’m unsure whether to choose Realtime Database or Firestore. Or any other options?
I am focused more on speed of db queries. The biggest problem with Realm was the update of realm version that could take minutes for phones that are not up to date and have slow internet connection.

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