Native Time Tracking
I know this question has come up, but I just wanted to add some more fuel to the fire...
It's a bit of a pain to have to use 3 separate web services / applications to fully keep track of tasks and time management.
Toggl is cool ... and Zapier is somewhat useful, but not really. But what really needs to be happening here is Todoist (and Wedoist) needs native time tracking for tasks. And it should be at the task level, not tied to a project... simply because not all tasks are a part of a project.
Anyway, I really hope that this feature is in the pipeline.