Hard Design: Notification System

What is the difference between FCM and APNS?

— Tests your understanding of this concept.

Answer Options

A FCM is for email, APNS for push

B FCM is Google's push service (Android/Web), APNS is Apple's push service (iOS)

C They are the same service

D FCM is for marketing, APNS for transactional

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This question is from the Design: Notification System topic (System Design Cases).

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