• iOS (previously iPhone OS) is a mobile operating
system developed and distributed by Apple Inc.
• Originally unveiled in 2007 for the iPhone, it has
been extended to support other Apple devices
such as the iPod Touch (September 2007), iPad
(January 2010), iPad Mini (November 2012) and
second-generation Apple TV (September 2010).
• Unlike Microsoft's Windows Phone and Google's
Android, Apple does not license iOS for
installation on non-Apple hardware.
• As of August 2013, Apple's App Store contained
more than 900,000 iOS applications, 375,000 of
which were optimised for iPad.
• Apps have collectively been downloaded more
than 50 billion times.
• There were 410 million devices activated.
According to the special media event held by
Apple on September 12, 2012, 400 million devices
had been sold by June 2012.
• The user interface of iOS is based on the
concept of direct manipulation, using multitouch gestures.
• Interface control elements consist of
sliders, switches, and buttons.
• Interaction with the OS includes gestures such
as swipe, tap, pinch, and reverse pinch, all of
which have specific definitions within the
context of the iOS operating system and its
• Internal accelerometers are used by some
applications to respond to shaking the device
(one common result is the undo command) or
rotating it in three dimensions (one common
result is switching from portrait to landscape
• iOS is Apple's mobile version of the OS X operating system used on Apple computers.
• Major versions of iOS are released annually. The current release, iOS 7, was released on
September 18, 2013.
• In iOS, there are four abstraction layers: the Core OS layer, the Core Services layer, the
Media layer, and the Cocoa Touch layer.
• The current version of the operating system (iOS 7.0), (iOS 7.0.1 for iPhone 5C and
iPhone 5S), dedicates 1–1.5 GB of the device's flash memory for the system
partition, using roughly 800 MB of that partition (varying by model) for iOS itself.
• iOS currently runs on the iPhone, iPad, iPad Mini, iPod Touch and Apple TV.
iOS Technology Layers
Core OS Layer
The Core OS Layer occupies the bottom position
of the iOS stack and, as such, sits directly on top
of the device hardware. The layer provides a
variety of services including low level
networking, access to external accessories and
the usual fundamental operating system services
such as memory management
Core Services Layer
Core Services layers contain the fundamental interfaces for iOS, including those used for
accessing files, low-level data types, Bonjour services, network sockets, and so on. These
interfaces are mostly C-based .
Media Layer allows you to create the best multimedia experience available on a mobile
device with the frameworks in the Media layer. More advanced technologies that use
interfaces based on a mixture of C and Objective-C is used in Media Layer.
Cocoa Touch Layer
For iOS, there is a similar API(Application Programming Interface) called Cocoa Touch
which includes gesture recognition, animation, and a different user interface
library, and is for applications for the iOS operating system, used on Apple devices
such as the iPhone, the iPod Touch, and the iPad.
Cocoa Touch is primarily written in Objective-C
iOS 1: The iPhone is born
Released iPhone 2G
06 / 2007
Core iOS UI
iOS 1.0 also introduced a new computing
paradigm that broke from smartphone
tradition: hiding the file system from the user
iOS 2: Apps
Released iPhone 3G,
07 / 2008 iPhone 2G,
iPod Touch 1st Gen
Native 3rdparty apps
The App Store used Apple's already
established base of iTunes music customers
iOS 3: Features
Released iPhone 3GS,
06 / 2009 iPhone 3G,
iPod Touch 2nd
iPod Touch 1st
iOS 3 was all about filling in most of the major
complaints and "gotchas"
iOS 3.2: The iPad arrives
iOS 3.2 Devices
iOS meets the big screen
iOS 4: Multitasking
Home screen folders
Face Time video chat
Unified email inbox
The major question at the time was whether
Apple's unique implementation of
multitasking was a distinction without a
iOS 5: Siri and much more
Released iPhone 4S.
10 / 2011 iPhone 4,
iPod Touch 4th
iPod Touch 3rd
As a natural user interface, it's one of the
more promising things we've seen come
along in some time
iOS 6: Goodbye,
iPad 4th Gen
iPad 3rd Gen
iPod Touch 4th Gen
iPod Touch 5th Gen
n Maps and
Realizing Apple's dream of a Google-free
iOS 7: Hello, Jony Ive
Released iPhone 5s,
Fall 2013 iPhone 5c,
iPad 4th Gen,
iPad 3rd Gen,
iPod Touch 5th
Clash of the titans: iOS 7 vs Windows
Phone 8 vs Android 4.3 comparison
iOS 7, Windows Phone 8 and Android 4.3 are the top three mobile operating
systems in the world
• Apple’s iOS is now in its seventh version, and is called the iOS 7.
• Drastically redesigned iOS was released on 18th September 2013
• It’s already Apple’s most popular OS ever
• Windows Phone 8 is the second generation of the Windows Phone mobile
operating system from Microsoft.
• Released in October 2012
• Microsoft’s mobile OS has showed a 133% growth over the year.
• Android is a Linux-based operating system, which operates on
smartphones made by a variety of mobile-makers.
• The latest version is the Jelly Bean 4.3
• Released in July 2013.
The iOS 7 has completely overhauled its previous user interface.
In fact, it is being billed as the biggest change to iOS since the
introduction of the iPhone. New icons, layering, gyroscopedriven parallaxing, and translucency are some of its new
iOS 7 has made multitasking a real pleasure! Double tapping the
home button will open up a row of active apps, and all you need
to do to close one is to swipe it up. Tap an app, and it will open
up in full screen.
And then there’s the Control Centre, which gives you quick
access to commonly used apps, controls, and settings. You can
simply swipe across the screen to adjust the brightness, turn on
the Wi-Fi, and more.
The iOS 7 UI looks extremely appealing, and works
Windows Phone 8
The user interface on a Windows phone consists of the Start screen, which is
filled up with Live Tiles that are dynamic in nature and updated in real time.
These squares are linked to different apps, functions, contacts, etc. You have the
freedom to add or delete tiles, and to rearrange them as per your liking.
Many features on this UI are clubbed into hubs, which essentially integrates local
and online content.
For example, the Pictures hub contains photographs from the user’s social
networking accounts, as well as those on the device. You can even comment on
images within the hub, and they will then get updated
The Windows Phone 8 is great for multitasking. Apps run in the background, and
by pressing a button you can switch between different active apps.
Microsoft’s mobile operating system does not come with a Control Centre. You’ll
need to go to the Settings menu to make changes. Since there is no centralized
notification centre, you can access controls through the Live Tiles as well.
Android 4.3 is perhaps the best OS for multitasking.
Press the multitasking button, and you will get an entire list of active applications.
Apps run in the background, and can even produce expanded notifications with
images, graphs, and more.
Notification on Android 4.3 are live and dynamic, but the list can be cleared with a
You may be able to access quick settings and functions by adding the Power
Control widget on to your home screen.
Apple has released the iOS 7.0.2 update, which now fixes the bug that previously
allowed anyone to bypass the Lock screen passcode.
To help you remember your account usernames and passwords for different sites,
this OS allows you to store all your information on the I Cloud.
When you login to a website, the details will automatically get filled up.
Apple promises that all passwords will be encrypted.
iOS 7 keeps track of app permissions at the root level.
This means that you can adjust your privacy settings for each app individually.
You also have the choice to activate the Limit Ad Tracking feature, which will block
marketers from planting cookies on your phone.
There’s also an icon that points out when an app has accessed your location data.
Furthermore, Apple has introduced a password-protect reset feature, which
ensures that stolen Apple devices can’t be used without the owner’s Apple ID and
Windows Phone 8
Windows Phone 8 encryption gets activated the minute your device is turned on.
This system, based on Bit locker, encrypts your entire device. Microsoft has also
added a new feature called the Safe Boot Feature.
Simply put, it makes it difficult for any component with an incorrect digital
signature to be loaded on to your Windows phone.
Every Windows phone will get a unique key burned into a chip, and only those
functions will work that match this digital signature.
In addition to all this, the OS runs all apps as third party Marketplace apps.
Microsoft has however not added any feature that protects devices if they get
Android 4.3 gives you the freedom to restrict certain users from accessing content
on your device.
can also stop individual apps from getting your contact information or location
This OS, like iOS 7, does have features that protect phones in case they get stolen
but you have to add them using Play Store!
iOS 7 does not allow for a lot of customization.
Like Android’s live wallpapers, Apple gives you the choice to use dynamic
wallpapers on your home and lock screens.
However, there is not a whole lot of choice yet.
• Windows Phone 8, like iOS 7, does not give its users a lot of liberty to customize.
• Live Tiles can be resized, and the lock screen can be used to add widgets,
photos, and notifications.
• You can select a theme colour, and your UI elements, including third-party apps,
will all coordinate accordingly
• Android Jelly Bean is the king of customization!
• You can be flexible with wallpapers, widgets, apps, custom launchers, and lots
• You can download content from the Google Play Store, and essentially
customize your device anyway you like.
Apple has launched iTunes Radio, which is a free streaming music service.
This feature is currently available to only those users living in the US, but it’ll soon be rolled
out in other countries.
You can listen to channels based on genres, and can create your own channel containing
your favourite music.
iTunes Radio will save users preferences, thereby playing music based on listening history.
Windows Phone 8
Xbox Music is available on this OS.
It’s a digital music service that offers music through ad-supported streaming, subscription
streaming, and purchase through the Xbox Music Store.
Users have access to more than 30 million tracks from music groups like Universal, Sony
BMG, EMI, and Warner.
Microsoft also allows you to subscribe to the Xbox Music Pass, which lets you download an
unlimited number of songs.
Android 4.3 lets you load your music from other handhelds and computers without any kind
You can also purchase songs from Google Play, and use Play Music All Access, which lets you stream whatever
audio you have stored in the cloud.
As of June 2013, the Apple Store offers 9,00,000 apps to its customers!
No other smartphone maker has been able to compete with Apple in this regard.
It’s also important to remember that most apps are first developed for iOS and then Android
and then maybe just maybe Windows Phone
One great update on the iOS 7 has been that apps will get automatically updated, without
you ever having to manually download updates.
If you still want to update apps manually, Apple gives you that option.
Windows Phone 8
The Windows Store has only 1,00,000 apps, and that too across different platforms.
Microsoft’s biggest drawback is its inability to provide a wide selection of applications for its
This OS has an Update All tab for its apps.
Google’s Play Store offers lots of free apps, though their quality may not always be as great as
those offered on iOS.
Thanks to the launch of Play Music, Play Books, Play Movies, and Play
Magazines, downloading content has become a lot easier on Android than before.
Auto updating option is available too.
Which one should you get??
• If you want a phone that just works, and that has all the great user
experience, app and game, accessory and services, customer support and
iMore community benefits, then the iOS is for you. It's smaller than many
competitors these days, doesn't have a hardware keyboard, and there's no
giant camera bolted on, but it remains the single best phone in the world
at what it does, and what it does it does very, very well.
• If you absolutely need a bigger screen from 4.3-inches all the way up to 6inch "phablets and with some great features and tweak plus hardware you
should get Android instead.
• Windows Phones come in a variety of screen sizes and price points, and all
run Microsoft's elegant Metro interface and experience. The biggest
reason to go with Windows Phone - literally - is the amazing camera
available on the Lumia 1020 and other Lumia devices