You need to work step by step for creating Gantt charts with Gantt chart apps. The earliest step is clicking on the button New Project and proceeding with the option, Create Project. Assign a name to the project and the specific days on which you would be working on it. Next, click on Save the Project. You can now go ahead with preparing a project timeline. This project timeline is comprised of all the tasks required along with names of those working on the tasks. Now is the most important step, attaching a schedule to every task. Most of the popular Gantt chart software have this click to drag functionality for setting task dates or schedules. You can now hover over every task to create dependencies. Change colour of every task as per your preference and your Gantt chart is ready.