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Calculus

From estimate to paid.

Estimates, invoices and recurring billing, with payment status at a glance. Client details come straight from the CRM, and reminders are drafted for you.

Estimates to invoices

An accepted estimate becomes an invoice without retyping a line.

Recurring billing

Retainers and subscriptions invoice themselves on schedule.

Payment status

Paid, due and overdue, in one view.

Polite reminders

Follow-ups on late invoices, written and waiting for you.

Mongoose in Calculus

Say it once.

Mongoose, the agent built into the suite, turns an estimate into an invoice and drafts the reminder when it’s late. Anything that would reach a customer waits for your approval.

Calculus comes with the whole suite.

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