Pushnotification Server side Implementation

Question

Recently i have integreted the FCM in my app recent version but my previous version of app was using GCM. Any ideas about whether we need to segregate the write the backgrou

Answer 1

FCM is still compatible with GCM, seeing as it is it's core. So switching to the FCM endpoint (https://fcm.googleapis.com/fcm/send) when sending your notification should still work for your app versions that have GCM. No need to write separate programs.