Square is a mobile payment system that was started by one of the co-founders of Twitter, Jack Dorsey. It has built a lot of momentum recently and a ton of small businesses have adopted it because of its flexibility, ease of use, and straight forward fee policy. I use it for my own business and actually just chose it as my pick of the week.
Square just received a rather significant update that allows business owners to showcase their products through a feature called "virtual shelves". While the update makes its way to both iPhone and iPad, you'll notice more differences in the iPad version. The iPhone version has a re-designed UI but virtual shelves is currently only available to iPad Square users. You can now add product variations and sort items into shelves. Hit the jump for a complete list of changes and more screens!