Or will i need unity iphone??
you need unity iphone.
unity 3d + ios license???
thats correct 
you can also use unity free+ios Basic if you’re on a budget then upgrade to pro later.
if you want to work on pro right away you need 3k total to make iphone games.
in the end you are only downloading 1 file and adding license key through the editor itself.
There is no such thing as “unity 3d”.
Yes, Unity Engine web site: 
www.unity3d.com
Thats the domain, the engine is called Unity
the engine called unity3d has nothing to do with this one here but is used in the WW2 MMO FPS
The website is just unity3d cause unity.com has been taken since 199x
That doesn’t have a space in it, and even if Unity were called unity 3d, the OP’s question would then involve “unity 3d ios”. It’s not like Unity iOS isn’t 3D-capable.
Indeed
Unity is only 3D capable and anything you see on screen is done through pure 3D (even GUI)