Real spent time, measured and supervised with screenshots is essential information that helps make your team more productive than ever.
When an executor has an estimate for a task in conjunction with spent stopwatch, he fits the target faster just because he controls time by looking in the tracker.
Well-known Parkinson's law states that "work expands so as to fill the time available for its completion". This does not mean the deadline will be met. This means the task with a deadline will be completed faster than a task without. And deadline visible on card close to real spent time will boost performance several times!
With the Tracklify executor doesn't have to spend an extra effort by subtracting clock time, he can't forget about the estimate just because he is able to see it.
A manager has the same common vision on board for all of the team. You can make better decisions when you see that something goes slower than expected. Also having a full log of execution times allows creating more precise estimates in the future.
Stay efficient, Use Tracklify