Is the Pressero system set up to be compatible with handheld devices or tablets like iPhones or iPads?

At this time both the Pressero admin as well as the eDocBuilder Interactive Designer are set up to use responsive design (they work for iPads and other tablets). The forms version of eDocBuilder works well on tablets as well, with one exception. Currently the forms based eDocBuilder uses flash for the advanced image upload option. Because both Apple and Android devices do not support flash, you would want your image uploads to use the standard upload option.