Create, display, and collect payment for your products online. A complete eCommerce solution integrated with Apptivo.
No, you'll need to purchase a API key from Apptivo to use this plugin.
You'll need to register for an account at http://www.apptivo.com. http://www.apptivo.com/where-to-find-your-apptivo-api-key-apptivo-access-key/
The plugin settings will be stored in your local WordPress database, and this data will remain in sync with Apptivo.
You can find the complete developer's guide here: http://www.apptivo.com/ecommerce-wordpress-plugin/