I have owned an iPhone 4 and probably have gained an in-depth understanding of the iOS system, and its capabilities and limitations. That was easy to do in the first place — to be familiar with the operating system without the need of a detailed manual.
As a disclaimer: I loved my iPhone 4.
Recently, I was provided with Samsung Galaxy S II as a business/office phone. And I got to play with the Android mobile operating system extensively.
And I found out, as advanced Android may be as an OS, it still lack a basic feature like a native capturing screenshots of your screen. Looking through the Android market, you’ll see apps that can only do screen captures if you root your device. If you ever encounter one that needs no rooting, you’ll find bad reviews about it that render it as close to being fake. I mean — there are fake apps in the Android market?
Oh, and there’s another way to do screen capture without rooting — but with the help of a desktop computer. You’ll find the tutorial at Android Central, or otherwise check out this Youtube video.
In my iPhone 4, screen capture is as easy as pressing the sleep and home buttons simultaneously. You don’t need apps for that.