if all you have is apps, then 16 GB.
it depends. an iPhone may have an 8 gb, 16gb, 32gb and 64gb(iPhone 4s) models.
An 16Gb iPad can hold up to 199 app and 1 video and like 580 photo
About 20,000
No. They both run an averagely speedy A4 processor. The difference is the 16gb can hold twice as many songs, videos, contacts, and apps.
That depends on the apps. They vary greatly in size.
about 100 or 200
it depends on how many gb's you have.
as much as it could hold an 8 gig could hold up to 8 gigs of apps. all apps are different sizes.
It depends how big the song is, it also depends how much other stuff is on it, like games and other apps, they take up more than a song... Hope this helps :)
There is no limit of apps in iOS. There is also no fixed number you can store on your phone because the size of the apps vary.
It depends how many gigabits it has and how much memory you have used up.
A 16GB ipod can hold 3,600 songs