If you feel you don't need a point of sale for small business, but still want to securely accept debit and credit cards, there are a few other mobile tools that accept payments:
Invoices: Square Invoices is an easy way to send invoices to clients through our free POS app, Square Point of Sale. Invoices are always free to send and will cost you just 2.2% for any invoice your customer pays securely online with a credit card. If you need to charge a client or customer on a recurring basis & say, for a weekly dog-walking service or monthly office catering delivery, you can even set up a recurring invoice cadence. Your customers can even choose to securely store their cards on file, so recurring invoices are paid automatically for the same rate as a standard invoice payment. However, invoices aren't suitable for all types of business, and in general could be more appropriate for repeat clients. For one-time clients, it might be better to get payment in person.
Virtual Terminal: You can get paid instantly over the phone if a customer still prefers to pay by credit card, but you aren't transacting face to face. With Square Virtual Terminal you can key a customer's card details directly into a web browser, and have the option of sending a digital receipt. It's secure, simple and a lot more convenient than manually keying in card details to the mobile app. Transactions processed with Virtual Terminal are charged at just 2.2% per transaction.