You can't lock your iPhone apps without jailbreaking the phone.
No but you can lock you phone hope this helped.
There is no way to do that. If you jailbreak your iPhone there is an app on Cydia that does that.
yes, but not all iphone 4 apps are available on the iphone 3gs/3g/2g becuase they are too high resolution apps, or need a front facing camera.
Although iPads can download apps made only for iPhone/iPod Touch, the iPhone can only download iPhone or iPhone/iPad apps. Apps made only for the iPad do not appear on the App Store. Luckily most of these apps have an iPhone counterpart such as Angry Birds (iPhone) and Angry Birds HD (iPad only).
it has 27 apps
Almost all of the applications on the iTunes store is compatible with the iPhone 4. Exceptions are applications which are for the iPad.
Well it was said that the iPhone 5 would have a much thinner screen then the iPhone 4. Then the Iphone 5 would have more and better apps on it.
the difference between a iphone 4 and iphone 5 is that the back is made out of aluminium and it has 5 row of apps on a page
the difference between a iPhone 4 and iPhone 5 is that the back is made out of aluminium and it has 5 row of apps on a page
You buy the iPhone app
apple create the apps on iPhone
only games can
it depends on how many gb's you have.