As usual, I am still discovering useful items on IFLY since there is not comprehensive manual. I am always pleasantly surprised at what is available on this app.
I just discovered that when clicking on an airport the box that pops up shows the preferable runway considering the winds. However, I have found that the info is not correct when showing the preferred runway during calm winds. Examples in my area are Corona Municipal (KAJO) and Riverside Municipal (KRAL). Both indicate the east facing runway. Actually, the west facing runways are preferred during calm winds.