Upon many requests, we have decided to allocate more and better resources for live apps. From now on, all apps, are by default in the Sandbox environment. When you release your app to either the Google Play store or the Apple App Store and get more than 200 downloads, you will see the option in your app settings to change app status to production.
Notifications sent from live apps will experience better performance and will be prioritized vs ones sent from sandbox apps.
Click App settings and choose App status