SAN FRANCISCO -- Square just upped the ante in its budding rivalry with PayPal over consumers and merchants in the multibillion-dollar mobile payments business. The company co-founded by Twitter ...

Mobile credit card payment processing apps for Android include PayPal, Square, SumUp, QuickBooks and Shopify, offering varied fees, hardware and features.

Cash may be king, but credit cards rule business. If you don’t take them, odds aren’t you’re not in business for long. And with the fees some banks charge to get a terminal, it can be a tough expense ...

Square is a long way from just offering a plug-in card reader dongle and there may be no better evidence of that with its fully revised Square Point of Sale app. This iOS and Android app enables ...