For me. I manage my university homework, research project, developing stuff all in Todoist, so I have to manually complete the tasks while I’m using the Pomodoro.
And the reason why it is a good idea is that it’s best to have an understanding how much time you spend on the tasks, and then you can plan them accurately. So I would recommend having such stuff:
complete the tasks in timetrack directly, no need to go to Todoist again
auto import seven days tasks, I think it’s better to let the user set from 1 - 7 days maybe. Or auto import the projects the user choose?
A place to see how much time I spend on each task, if possible, each project.
Above features can also be part of premium features since it will take a lot of workloads! I know there is something called Pomodone using Pomodoro and integrated with lots of 3rd todo service and they charge $12 a year for a student education discount and still have limit with stats reading and graph analysis.