I use Square Register with the iPad, it's great in many ways but the one issue I have with it is that it seems like I should be able to print a receipt from my computer printer. It is set up for receipt printing - but only if you buy an actual receipt printer. I can email a receipt to the customer, but if they don't want it emailed (I run an antique shop and I have customers who, believe it or not, don't have email) I'm stuck. If I pull the receipt up on screen it shows my percentage and all that, which I really don't want to give the customer. I have neither the space nor the money for a dedicatred receipt printer, so I hope to eventually find a work-around. If anyone has figured this out, I'd love to hear about it.