This is Part 2 of my tutorial on Push notifications. Please click the link for Part 1 of the tutorial. We are building a Retweeter app. The Retweeter app is a React native app which displays a list of tweets it receives from a push notification. The user has an option to retweet some of the tweets.

In Part 2, we are going to build the server infrastructure for push notifications using AWS Lambda.…

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Push notifications was originally an iOS concept. Apple has a push notification service called APNS. App that wants receive notifications should register with the APNS. A server component should send notifications to APNS directed towards one or more devices. The app receives the push notification from APNS and does one of the following actions:

  1. Display a notification or short text message
  2. Play a sound
  3. Update the badge in app icon
  4. Allow the user to perform an action

As you can see, push notifications are a powerful feature in iOS.…

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