When I was studying in KPTM Bangi for my diploma way back in 2001,mobile phone is still a luxury item for most students.But its drastically became a necessary item as a tool for communication. Istill remember during that time, Nokia was the most popular brand of mobilephones. We didn’t even bother to know what operation system that runs thephone, or even want to use the Internet right from your phone to read emails,browse websites & so on. We only want a phone to have colored screen,camera function & sleek design. For me, Nokia 3310 is good enough, duringthat point of time :) 
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| My first mobile phone - Nokia 3310. Sources: www.nokia.com
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Today, Nokia phone areno longer the most desired phone. Mobile phones become “Smartphone”. You canhave various brands from Samsung, LG, HTC & Apple. Compared to those days,people now are comparing which one is the best Smartphone. Two most popular OSfor Smartphone on the market today are iOS and Android. 
iOS
The iOS was developed byApple Inc. which was introduced during the 1st iPhone launched in2007. From there, the iOS has been extended to other Apple devices such iPad& Apple TV, the software only applicable to Apple products as Apple doesnot license iOS for installation for non–Apple hardware. The iOS usemulti-touch gestures where you can open an apps from the device using yourfingers. 
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| The new iPhone 5 running on iOS Sources : www.apple.com
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Android
If iOS only applicablefor Apple products, Android is an open source operating system which isdesigned for smartphones and tablet computers. Android isdeveloped by Google and the 1st Android- powered phone wasintroduced in 2008. Some of the current devices that use Android OS are SamsungGalaxy SIII, HTC One X, Nexus 7, Asus Transformer and many more. 
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| Samsung Galaxy SIII running Android  4.0 (Ice Cream Sandwich) Source: www.samsung.com
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Which one is better?
For me, it is hard totell which one is the best mobile operating system, I’ve used both iOS &Android OS devices, each have its own great features. Below list represent myoverall comments for both operating systems. 
iOS
The good
- Smoother     user interface – I really like the smoothness of the touch screen of iOS  whenever I swipe or tap, so far it does not     disappoint me. 
- Great     display – The Retina display really help portraying clear screen display     especially when zoom pictures and web browsing.
- Great     apps – This is the best features for me when thinking of iOS. Apple     claimed that iOS have more than 700,000 apps in their Apps Store. Even     though some the apps you need to pay to download, at some point     the apps will be downloadable for free. It just the matter of time and     when the apps will become free to download.
- Upgrade     iOS for free – What I really like about iOS is that you can get free     upgrade. The current one is iOS6 which is downloadable for most of apple     devices right from iPod Touch, iPad or even Apple TV. 
The bad
- Battery     life – Battery is the main issue when we     talk about smartphone. My iPhone 4 needs to be charged everyday as its     keep draining very fast, even when you’re not using it. Is it because of     the iOS or the hardware? Well I’m not so sure.
Android OS
The good
- Notification     centre – Compared to iOS, Android has better notification. Any email, SMS     or Missed calls will be showing in the Notification centre. 
- Variety     of phones – The good thing about Android Open source is that you can     choose any phone that runs on Android. While iOS only limited to Apple     devices.
- Widgets     – Android has good widgets such as weather & clocks which is     accessible right from your home screen.
The bad
- Advertising     on certain apps – When I played Angry Bird games on Android phones, I’m     really annoyed with the ads pop up during the gameplay. To remove the ads,     you need to buy the apps... Well I guess most of android users won’t simply buy the     apps just to remove the ads.
- New     OS update, new phone – If you have a phone running Android Froyo 2.0, you     won’t be able to update to Ice-Cream Sandwich 4.0 due to hardware     limitation. If you want to have the new OS, you might have to buy the     latest phone. 
Overall, both operatingsystems are great in their own ways. Its not about which OS is the best, it’sactually how the OS benefits you in your daily life.