General Pricing Question

So if I purchase the Unity Pro licence for $1500, I then will have to pay perpetually on top of that $75 every month to use any one of the add ons (iOS Pro, etc)? So at no point in time I will be free from obligation to make monthly payments to Unity3d even after purchasing their licence for my game to work? Sorry, if it sounds like I’m a bit confused about it, I am.

Unity Pro, the iOS Pro and Android Pro add-ons are all individually either $1500 one-off or $75 per month. I think it’s pretty clear here: https://store.unity3d.com/

Unity Pro cost is 75$/month (it’s own) or just one time $1500
and if you want apple pro plugin or android pro plugin
you have to pay them $75 more for each plugin per month or each plugin just $1500 for each different plugin .
Prices are same .

https://store.unity3d.com/products/subscription

https://store.unity3d.com/

https://store.unity3d.com/products/pricing