[raman325]

This is really cool! Found a small bug - when you add a second card, the second card displays a pill with the total time difference between the first card and second card. When you switch the order of the cards by dragging, the pill remains on the same card so it's basically showing the total time difference in reverse. Clearing the cards and starting over with the switched order but by creating each card again results in the pill being displayed on the correct card.

[finger]

That's not a bug, that's a feature. It shows the pills based on the highlighted card. Click a different card, and the "pills" change.