Before you write your next to-do list, first download Todoist. You won't be alone—more than 30 million people have already downloaded this to-do list and task manager app. Based on the more than 300,000 reviews, for those trying to plan and collaborate on work projects as well as organize personal obligations, it is easy to use.

Todoist is available on all major devices and platforms, and users can link Todoist with calendar, voice assistant, and more than 30 other tools or apps. It also offers hundreds of business templates for such aspects as project management, workflow development, meeting agendas, content pipelines, sales goal trackers, and event planning. You can also access templates for personal use to plan meals, track your fitness, make a reading list, and more.

The free version enables users to work on up to five projects with five collaborators. The pro version, at a nominal fee, increases that allotment to 300 active projects and 25 collaborators. A business teams version is also available and includes a team inbox and priority user support.