Annie, invoice assistant, is a full-featured invoicing service with a built-in assistant. Annie is available through a side-bar chat interface to help with regular invoicing tasks. She will also make suggestions about actions to take and things to be aware of (such as overdue invoices or dates when you typically invoice certain clients). Using natural language, it's possible to ask Annie complicated queries such as "Show me overdue invoices from last May", or "How much did I bill in June and July?"