Tasks
A task in Invoice Ninja is a time entry — a record of work you've done for a client, usually billed at an hourly rate. Tasks are built for the kind of work that's measured in hours rather than units: design sessions, legal consultations, support calls, on-site visits, development sprints, or any service where what you're selling is your time. Once the hours are tracked, a task can be dropped straight onto an invoice and billed without re-keying anything.
Tasks can stand on their own, or they can be grouped under a Project when a piece of work spans multiple sessions or team members. They're also one of the most useful pairings with Expenses — together they let you bill a client for both your time and the out-of-pocket costs incurred on their behalf.