Paymo is a project and task management app designed specifically for freelancers and small agencies — combining task management, time tracking, invoicing, and client portals in one tool. Founded in 2008, Paymo addresses the full operational workflow of client work: from task creation and time logging to invoice generation and payment, without switching apps. Its Gantt chart, kanban board, and timesheet views give project managers multiple ways to track deliverables, making it one of the most complete tools for service-based businesses.

Reference:

Paymo on Wikipedia

https://www.paymoapp.com