If you're facing this problem and know your Internet connection is working fine, you've come to the right place.
At this moment, if you would like to enjoy the newest i OS version features, you can also download it and upgrade your i Phone i Pad i Pod to i OS 11.
Although we all know that every newer i OS version will not only bring fresh features to make our life more funny, but also update fixes for bugs occurring in the previous versions.
Sometimes an app just needs a fresh start and when you do this, you'll install the latest version of the app.
To learn more about deleting apps, read: Just like your i Phone can benefit from a restart to clear its memory, the App Store app works the same way.
If your settings are off, it can prevent you from being able to update apps.