Migration from GCM to FCM needed?

Question

Google just announced that Google Cloud Messaging is now Firebase Cloud Messaging. What does this mean for existing users of GCM and what migration (if any) are needed?

Answer 1

Google have expanded GCM to send messages to multiple platforms beyond Android: iOS and Chrome. Firebase is known for being cross platform, so FCM now makes a natural fit in the Firebase suite of features designed for Android, iOS, and mobile web.

FCM

• it is advance/improved version of GCM but with new brandname Firebase
• very easy/Simplified client development
• Server-less console where anyone can send notifications to specific device
• Notification payload: 4KB, Message payload: 2KB. Note that the notification includes device and app information too.
• Stores 100 notification/messages per device if the device is offline.