Todoist is a task management and organization app that helps users track and prioritize their to-do lists and projects. It allows users to create and organize tasks, set due dates and reminders, and track their progress. Todoist also includes features for project collaboration, such as the ability to assign tasks to team members and leave comments. It can be accessed on a variety of platforms, including iOS, Android, and the web, and it offers integration with other apps and services, such as Google Calendar and Slack. Todoist offers both free and paid subscription plans, with the paid plan offering additional features such as task labeling and filters, as well as the ability to set custom reminders and integration with Evernote.