Is there any way to measure the time?

[singhravi1]

Activity Bubbles APP:

by seeing the bubbles, i can see the number of tines i unlocked my mobile phone and their size give us relative measure of the time i spent.
But is there any way to find out the calculative time spent?
I'd think it would make sense if we take the whole screen size as 24 hours and using that we can get the idea of spent time by seeing the filled space.

Feature request: Can we add an option for user to set the time within 24 hours, according to which screen will be fully covered. For example, if i set 5 hrs limit, screen would be half full after 2.5 hrs of usage.