Why this works:
If you choose to receive Push Notifications from an app, that app keeps running on your iPhone even if you don’t have it open. For example, if you have Push Notifications turned on for the ESPN app, the ESPN app will always be on in the background of your iPhone in case there’s any breaking news about your favorite sports team or athlete.
Now, we’re not suggesting that you turn off all your Push Notifications — it’s up to you to choose which Notifications you can live without. There are some apps, such as your iPhone’s built-in Messages app, where you’ll want to leave Notifications on because you want to be notified when you receive a text or iMessage.
Just keep in mind that Push Notifications can be a big reason why your iPhone battery drains fast, so turn off the Notifications you don’t need.
Pro tip: