If I have a website that is an ecommerce website (example: CoolGadgets.com), I can import the website and make it an app? It will be an actual app and not just pull up the webpage of the site?

If I offer Paypal, Stripe, Klarna on my site as ways to pay, can my customers still pay that way? Or do I have to go through Shopiroller and use whatever payment integrations you have available? What if I dont have a subscription to that? How much is it?

Also, if I want to post it on the App Store, I need a developers account correct? Is that per app or is that a yearly charge for unlimited apps?

Definitely looking at full stacking this. Thanks!