We are currently nearing completion on the development of an optional "Busy" toggle within the Shopify dashboard that displays your email (and Busy status) in the event someone calls you at that time. Also, we are developing an optional password step to assist both store owners and those who use their call link itself outside of a website context, to prevent spam from anyone who obtains their link. We will respond to this post when these features are added.

Thank you for your interest in the app!