Marketcircle has handled Nerds Limited's invoicing for 4 years strait and has yet to lose an ounce of data. First with Billings then Billings Pro, we've used Marketcircle products since they took home the Apple design award in 2010. Their workflow is simple, elegant, and straightforward. It works on the web, and all Apple devices. We love it so much that a few weeks ago, we wrote them with some suggestions. Not only did they reply, but they asked to do an interview. Below are the two articles which came from a delightful hour of Skype conversation. Enjoy.