A NOW button to timestamp exactly when you start a task

I love the button in Upbase that starts tracking the time you work on a task. To expand on this Skedpal has a feature where you can click the now button and it timestamps what time you start the task. This would be helpful (at least for me) because I very often forget to click the time tracking button until I've already started working on the task, so I'm often guessing how long I've been working on something.