Ask HN: A credit card swiper for authorize.net?

[marcusEting]

I have a non-profit client who wants to be able to accept credit card donations at charity events. They have an authorize.net account and are looking at http://www.usbswiper.com/

I've also seen https://squareup.com/

Have you used any mobile credit card solutions and what did you think of them?

[trafficlight]

I don't have a lot of experience with them, but I'll share my thoughts on the 2 I have used.

I have a Square swiper that I use with my Droid X. I don't use it very often, but it seems to work well. Square's pricing is really good if you are doing low volume or low value transactions.

I just had a client that ordered one of Intuit's GoPayment swipers. It apparently doesn't work with every Android phone; it doesn't work with a Droid X or Droid X2. It did work alright with a iPhone 4S. I didn't think the swiper itself was as good as Square's.