You may suspect you're addicted to Facebook and have wasted hours watching videos of cats.
Now there's a way to find out - but it might make for surprising reading.
A new feature in iOS 9 tells iPhone users how much time they have spent browsing the internet and using different apps such as Candy Crush, for example.
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A new feature in iOS 9 tells iPhone users how much time they have spent browsing the internet and using different apps such as Candy Crush, for example. Two examples are shown left and right
To find this information, iPhone users with the latest software can go to the 'Settings' menu then select 'Battery', before tapping the clock icon at the top right of the list of apps.
They can then see a breakdown of their activity in the past eight or 24 hours, for example, with the apps they have spent the most time on at the top of a list, and the least popular at the bottom
For each app users can see how much time they spent interacting with it and how much time it spent running in the background.
For example, MailOnline found one user spent 10 minutes looking at Facebook, while the app spent 47 minutes running in the background.
It's immediately noticeable that low mobile coverage drains battery too, with 'No Mobile Coverage' accounting for one per cent of a user's battery.
They can then see a breakdown of their activity in the past eight or 24 hours, for example, with the apps they have spent the most time on, such as Candy Crush (illustrated) at the top, and the least popular at the bottom
iOS 9 also sees the introduction of 'Low Power Mode,' a feature that Apple mentioned at its worldwide developer's conference in June.
The feature is similarly found in the Battery menu in Settings.
When a phone's battery slumps below 20 per cent, iOS will ask a user whether they would like to switch it on.
It stop apps and emails refreshing as well as automatic downloads, for example, to help a handset last longer.
It is automatically disabled once it's plugged in again.
Apple claims that power efficiency improvements will give some users an extra hour of additional time before charging.
These battery improvements should be seen on all devices but will more significant on newer devices with hardware that is powerful enough to take advantage of them.
iOS 9 also offers dynamic wallpapers, a smart news app and a cleverer keyboard.
Apple has also added an app that makes it easier for Android users to switch to iOS.
Called 'Move to iOS', the app securely transfers contacts, message history, camera photos and videos, web bookmarks, mail accounts, calendars, wallpaper, and DRM-free songs and books. Elsewhere, the Move to iOS app will help users rebuild their app library.
iOS 9 also sees the introduction of 'Low Power Mode,' a feature that Apple mentioned at its Worldwide Developer's Conference in June. The feature is also found in the Battery part (right) of the Settings menu (left)
Any free apps, such as Facebook and Twitter that have been installed on the Android device will be suggested for download from the Apple App Store.
It's available to download for iPhone 4s or newer, iPad 2 or newer, the iPad mini and later models as well as the fifth-generation iPod touch.
On the iPad, new multitasking features have been added so users can split the screen between two apps for the first time, or use them both at once.
Apple said these new features will enable iPad users to 'make even better use of its large screen'.
WHAT'S NEW IN APPLE'S IOS 9 SOFTWARE?
The software will be available to download with an iPhone 4s or newer, iPad 2 or newer, the iPad mini and later models as well as the fifth-generation iPod touch.
Better battery life
Apple claims that power efficiency improvements in iOS 9 will give some users an extra hour of additional time before charging.
These battery improvements should be seen on all devices but will more significant on newer devices with hardware that is powerful enough to take advantage of them.
'Move to iOS' transfers contacts, message history, camera photos and videos from Android device
Improved security
To boost security, default pin codes are now six digits long rather than four which Apple said increases the possible combinations from 10,000 to one million, and is therefore more secure against hacking.
Two-factor authentication, where a second layer is added to log-in, is also being introduced with users now required to enter a code when they log in from a new device for the first time.
This code will be sent to and displayed on a user's other Apple products.
Multitasking
The new Slide Over feature lets users open a second app without leaving the one they're in.
This lets users quickly browse the web, respond to a text message or jot something down in a note, then slide that app away and get back to the one they were using before.
Meanwhile, Split View lets users have two apps open and active at the same time.
HealthKit
At its WWDC conference in June, Apple said its updated HealthKit app will let users track how much water they drink, UV exposure, how long they sit still for and their reproductive health, as well as current features.
No detailed information was released about sex tracking, but screenshots suggested people will be able to log when they have sex as well as if they used protection.
A slide briefly shown during June's presentation showed a category titled mensuration so women will finally be able to track their periods in the app, too.
Move to iOS
The firm has added a free app to its iOS 9 software called 'Move to iOS' that lets Android users 'migrate' all their contacts, photos and songs over to Apple devices at the touch of a button.
The app securely transfers contacts, message history, camera photos and videos, web bookmarks, mail accounts, calendars, wallpaper, and DRM-free songs and books.
Elsewhere, the Move to iOS app will also help users rebuild their app library.
Any free apps, such as Facebook and Twitter, that have been installed on the Android device will be suggested for download from the Apple App Store.
While paid-for apps will be added to their iTunes Wish List and will need to bought again.
Apple is also taking aim at Google Now with its iOS 9 software with a feature called Proactive Assistant (pictured). Based on the apps people commonly use and the time of day they use them, Apple will give 'intelligent suggestions' for what they might want to do next, even before being asked
Proactive Assistant
Apple is also taking aim at Google Now with its iOS 9 software with a feature called Proactive Assistant.
Based on the apps people commonly use and the time of day they use them, Apple will give 'intelligent suggestions' for what they might want to do next, even before being asked.
Siri 'always on'
During last week's iPhone 6s and iPad Pro launch conference, Apple confirmed Siri will be 'always on' in iOS 9.
It means Siri is permanently switched on and listening for the voice command 'Hey Siri', even if the phone is on the other side of a room.
'Hey Siri' isn't an entirely brand new feature - it was introduced in iOS 8 - but it could only be activated when the phone was plugged into charge .
The new Slide Over feature lets users open a second app without leaving the one they're in. Meanwhile, Split View (pictured) lets users have two apps open and active at the same time. Both of these features will take full advantage of the larger 12-inch screen on the iPad Pro
App Thinning
A background feature introduced in iOS 9 is called App Thinning.
It has been explained on the watchOS Developer Library site and is aimed at developers looking to optimise their apps to work on iOS and the watchOS.
It ensures apps use the lowest amount of storage space on a device by only downloading the parts it needs run on the particular handset it is being installed onto.
It 'slices' the app into 'app variants' that only need to access the specific files on that specific handset.
Previously, apps would need to be able to run on all handsets and account for the varying files, chipsets and power so contained sections that weren't always relevant to the phone it was being installed on.
This made them larger than needed.
Under the new plans, when an app is downloaded from the App Store, the app recognises which phone it is being installed onto and only pulls in the files and code it needs to work on that particular device.
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