Final answer:
The cloud computing service model offering remote access to applications based on a subscription fee is called SaaS (Software as a Service). It allows users to use cloud-based apps via the Internet without managing the infrastructure.
Step-by-step explanation:
A cloud computing service model that offers remote access to applications based on a monthly or annual subscription fee is known as SaaS (Software as a Service). This model allows users to connect to and use cloud-based apps over the Internet. Common examples include email, calendaring, and office tools (such as Microsoft Office 365). SaaS provides a complete software solution that you purchase on a pay-as-you-go basis from a cloud service provider. You rent the use of an app for your organization, and your users connect to it over the Internet, usually with a web browser.