Hi,

To manage recurrent weekly tasks and bill them monthly based on the number of tasks performed, Odoo can be utilized. The Project app can be used to create and manage tasks, with the option to set up recurring tasks on a weekly basis, such as every Tuesday.

For billing, the Subscription app can be used to manage recurring billings and automatically generate invoices monthly. However, since the number of tasks varies each month, a custom solution may be needed to link the number of tasks performed to the invoice. This can be achieved through custom development or by using Odoo Studio if you are using Odoo Enterprise. For further assistance with customization, you can contact Odoo support via odoo.com/help.

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