Odoo helps you to create professional quotation in minute, by default Odoo support one-time sale with standard quotation to sale products or services. This is the default configuration, there is nothing to setup, to sale the packaged product or services you need to activate the online quotation feature of sales application.
Many businesses provide regular services to their customers, manage accounts and track the record of services provided, generate the recurring bills on regular intervals, the simple example of the recurring service is the annual maintenance contract. As a business, you want to know monthly recurring revenue, non-recurring revenue, revenue per customer, annual run rate, analysis reports by the sales person, and you can get the cohort analysis by contract or by revenue.
You can use subscription application to generate the recurring bills based on the service provided. The subscription may include-- annual maintenance contract, a monthly subscription to a service, etc.