When a gadget company sells its products for big bucks, it has every reason to refine its designs on an ongoing basis, making them ever more tempting to paying customers. But if the gizmo in question ...

Square, the payments company that makes it easy for small businesses to accept credit card payments wherever you go, is finally catching up with the times today by updating its tiny card reader.

LAS VEGAS — Square sells its own cash register replacement for the iPad, but the mobile payments company has yet to debut any iPhone-compatible accessories for its card reader. Well, until now.