Quick question about Credit Card readers.

Hey, everybody. I appreciate how helpful some of you are here in the community and I'd like to ask for your advice. I'm using Aronium for my store that I'm about to open and I like it so far.

I'm wondering if you guys have any advice on which Credit Card processing I should go with. I've looked at Shopify and Square and they seem nice, but I cant find any information on which works best with this POS.

If I were to purchase a terminal from Square or Shopify, how could that work? I've read that Aronium has no integration within the app for CC terminals and that is okay. But I'm just wondering what you guys use and how its working out for you.

Thanks.