Can you get iTunes on an iPhone?

I want to listen to downloaded music rather than streaming

It probably depends on what kind of phone you have

Yes, there's the iTunes Store app as well as the Music app.

Yea…

There's the iTunes app on your iPhone or if you meant song from iTunes on your iPhone you could sync those across using iTunes on your computer.

It should be "standard equipment".

Look for it!

Comes with. If it is missing, get another from the APP store.

Obviously

Yeah
if you like music freefreefree, hit on you tube, trouble is they often mix smoosh & jumble up some of everything even when you type in 'full album' or you get the one tune you want then yt half figures out what you don't really wanna hear & play it.
a lot of music fans load up on full albums, you learn which they are by trial, search & error