By John Gruber
Square Reader SDK lets you use Square hardware to take payments in your app.
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All prices are in U.S. dollars.
Order processing is handled through PayPal when using the above “Pay” buttons. You do not need to become a PayPal member to complete your order; all you need is a credit card.
If you have any questions or comments about the payment processing, or about an order you have already placed, please send email to email@example.com.