Does your paid subscription let you see when a task was completed?
Yes, with Todoist Premium you can see a detailed overview of your completed tasks (incl every completion event of a recurring task) - each with a timestamp (hours and minutes), sorted by date and you can filter the list by time, project or labels and visualize your productivity graphically.
You can see how it works in this short video: http://www.youtube.com/watch?v=IWCBVE3IhJ8 At the 0:44 mark, we explain these features (both the quick view and the full view).
Thank you for your prompt reply. I will def be signing up for premium. Thanks! Gina