What does background app refresh actually do and why should I use it/not use it?
In: Technology
It lets your apps go online and fetch data while you’re not using them. This lets your mail app (for example) already have your new emails waiting for you when you open it. If you want it to give you notifications when you’re not actively looking at the app, you need this on so it can check for emails and actually know when you get an email.
For other apps, you may want to turn it off. This could be a waste of data, battery, or even a privacy issue if an app like a game which shouldn’t really need to check in online constantly is allowed to do so.
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