Hello, everyone!
I have developed a data field to meet some of my needs while running. It seems to be working just fine and I thought maybe someone else could find it helpful, so I published it on CIQ. It is free and, of course, feedbacks are always welcome! 
It provides live predictions based on the current activity's average pace. The distances to be tracked are customizable. Once each distance is reached, its field changes its color and the final (real) time for that distance is fixed, i.e., no longer updated. The evolution may be checked on the activity's summary aftewards. It is also possible to disable the evolution tracking and see only the final times. This data field also shows the activity's current average pace, elapsed time and elapsed distance.