Here are the detailed features of Todoist:

1. Task Management: Create, organize, and manage tasks and to-do lists with various levels of prioritization.
2. Project Organization: Group tasks into projects and sub-projects for better organization and tracking.
3. Due Dates and Recurring Tasks: Set due dates, deadlines, and recurring tasks with custom schedules.
4. Labels and Filters: Use labels to categorize tasks and filters to view tasks based on specific criteria.
5. Task Prioritization: Assign priority levels (P1, P2, P3, P4) to tasks to indicate their importance and urgency.
6. Collaborative Features: Share projects and tasks with others, assign tasks to team members, and collaborate on shared projects.
7. Task Comments: Add comments and attachments to tasks for additional context and collaboration.
8. Notifications and Reminders: Receive notifications and set reminders for upcoming deadlines and tasks.
9. Integration: Connect with other tools and services such as Google Calendar, Slack, and Dropbox for enhanced productivity.
10. Cross-Platform Sync: Access and synchronize tasks across multiple devices, including web, mobile, and desktop applications.
11. Karma System: Track productivity and progress through a points-based Karma system that rewards completed tasks.
12. Keyboard Shortcuts: Utilize keyboard shortcuts for efficient task management and navigation.
13. Customizable Views: Personalize task views with different layouts and sorting options to suit individual preferences.
14. Dark Mode: Switch to dark mode for a more comfortable viewing experience in low-light environments.
15. Data Export: Export tasks and projects for offline use or backup in various formats like CSV.
16. Privacy and Security: Ensure data privacy with secure access and encryption.