What is the best productivity tool?

Trello is good, but for me and my team, GanttPRO Gantt chart maker (https://ganttpro.com/) is one of the best productivity tools for various businesses. It has certain characteristics that make it effective and capable of enhancing efficiency and effectiveness in various tasks. Here are some key attributes that contribute to the power of this productivity tool: ease of use, versatility, integration capabilities, collaboration features, automation, workflow optimization, etc.