The app has been created by Jan Kratochvil, formerly of TaskCrunch fame, who joined Todoist to build their Windows experience. It's important to remember that this is still a preview, as such it won't be perfect, with more features and polish still to come. Building apps is a time consuming process and while patience is needed for a full release, Todoist is putting it out there for folks to use and give feedback on.

"Over the years, many loyal users have requested a Todoist app for their Windows phones. That's why we felt strongly about releasing a full-featured, mobile version now rather than later. That said, our top priority right now continues to be creating the best experience possible for larger screen sizes.

At this point in time, we aren't able to invest as much energy into polishing the mobile experience as we'd like. Currently, the mobile version doesn't include swipe interactions on tasks, and the app will be slower on phones when compared to the experience on desktop/tablet. Nevertheless, we hope to improve the experience for our Windows phone users in the future."