By Curtis Walker

Square first launched their service a year ago, since then they’ve grown into a valuable credit card processing resource for individuals and small businesses. Invented by Jack Dorsey after a friend lost a $2,000 art sale due to a cash-only operation. Dorsey (@jack) is also the guy who invented Twitter.

Unlike every other credit card solution, Square charges no upfront costs and skims a mere 2.75% off transactions. Unlike PayPal, which is also inexpensive, Square requires no setup on the part of the customer.

Available now for Apple iOS and Google Android, the Square app is free. It works in conjunction with a free credit card reader that plugs into the plain old headphone slot. The best experience comes from using the iPad app. Users can enter individual prices or use set up items in advance. Sales tax and tips can also be collected.

Once items have been added to the cart, swiping the card takes the user to a confirmation page where they sign and confirm the purchase. Receipts are delivered via SMS or e-mail and include all sorts of useful information for the customer. An internet connection is required in order to make any purchases.

The only restriction on charges is a limit of $1,000 per week to be deposited for new users. Transactions above that amount are held for 30 days.

Square is ideal for any business that wants to accept credit cards while avoiding the majority of fees involved.

New users can sign up for Square online or at any Apple Store.