I use square. I like it because it’s linked to my website, but it’s also on my phone and can be used and Bazaars and art shows. It’s super easy to use and track how much I make. I also have the ability to send invoices to people who don’t go through my website, and the can pay with a credit card on their end. I find most people don’t have a ton of cash, but if you accept credit cards, they’re more wiling to buy.