A single-seat license means that when you purchase a Digital Creative Tools product you and only you, as the original purchaser, have our permission to use the product. Our single-seat license also allows for one (1) install on each different type of device that you own (e.g. Desktop, iPhone, and iPad), but you many not share the product files with anyone else. Each person and/or employee in a company must purchase their own copy of our Digital Creative Tools products. For more information, please read our Digital Creative Tools License Terms (link is above in the product description.)