Currently I'm trying to learn how to use Google Play Billing Library V1.2 for implementing In-App Purchases (IAP) - Subscriptions mainly in my Android app.
While looking at Add subscription-specific features, I came across this:
Also, before reading the rest of this page, you should also have real-time developer notifications enabled. Real-time Developer Notifications allow you to react proactively to state changes, to increase your engagement, and to reduce user turnover.
And when I tried to check Add real-time developer notifications, it told me I needed to setup Cloud Pub/Sub using my own Google Cloud Platform (GCP) project. Then I checked GCP and found that it is a heavily paid service which I can't seem to go for, considering that it is my first app that I'm talking about.
So, my question is that is it really a must to enable Real-Time Developer Notifications for implementing subscriptions in an Android app? If yes, do we always have to go through a paid service like GCP to achieve this or are there any free options too?
No, I just added a subscription to an app and didn't do anything with real time notifications.