See all Xcode Releases and read the release notes in the app.
You have to open the app frequently that the push notifications are working.
Planned features:
• Select if you want to get notified for only Release, only Beta or both
• Push Notification shows which version appeared
• Select Push Notification time
• AppIcon Selection
The EULA license agreement is used: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/