Ability to calculate date differences. Example - project start date aug 5 and project end date aug 10 with a field like project length showing the difference as 5 days
Admintapforms (Admin, Tap Forms) commented
You could do that by subtracting one date from the other. The results will be in seconds. Then just using some math by dividing you will get your results in days. Just set your label to be something like "Result in Days". That'll do it.
This can be very nice, and a graphical view for the result.