If my iphone 4 is jailbroken...

[kash518]

Am i able to download any app?

 

[iJeff]

As many as your heart shall desire

 

[iCrank]

Am i able to download any app?

If you're talking about pirated apps then no discussion will be allowed. Please review our forum policy. A link is provided for you in my signature

 

[Gregoris]

as long as you have the space to install it and money to purchase the pay for ones (if any interest you) or just get the free ones from the app store, there are loads of good ones