Payment of subscription

Hi,

Long time 1Password user.

I have always paid for 1password via my credit card. However, I have changed to another bank and want to cancel my old accounts (and their credit card) with my old bank. 

The problem is that I have only used my credit card for 1password during the last 3 years. So I would like to cancel my credit card and pay another way. I live in Europe and therefore don't have an American bank account, this is a problem. How can I pay?

An iPhone user here. So I was thinking, can I somehow stop paying via my credit card and begin to pay through the Apple App Store? As this seems to be the only solution for my specific situation.

Hopefully someone can help me with this. That would be great!

Regards,

Chris