Learn 5 ways you can monitor the apps on your iPhone or iPad in iOS 8. You can check to see how much battery each app has used in the last 24 hours or 7 days. You check to see how much storage space each app is using, and even delete some content for some apps. You can monitor and adjust the privacy settings to control what information apps have access to. You can also adjust the notifications settings for apps and see what is new for recent app updates.