Getting Iphone as new business phone

Always used android an window's. Starting new business an plan partner he got iphones. My question is how different is operation from android to iphone. An 2nd is there a place i can see iphone apps needing to find inventory app for parts would like to check out so i can move along once i get phone.

1. It's a good phone for business and there are many apps.

2. You can find all the apps in the App Store. Whatever you had in your current apps, when you login to your new apps, you'll get them back on your iPhone.

Pretty different, but fundamentally the same.
The App Store of course is where you can check out apps as needed.