When flight planning for IFR, it's nice to be able to know what routes ATC has recently been clearing between your planned departure and arrival airports. It raises the confidence level you'll get an "as filed" clearance rather than have to change it on the fly. Multiple flight planning apps do this...Fltplan.com being only one. I don't begin to know the mechanism by which that info is avialable but usually I'll see the last 5 clearances given between the two airports and some indication as to the type aircraft that was associated with the individual clearance. Many times higher or mid altitude jets will have a different route than us lower level bug smashers. If I want to use one of the recently cleared routes, I can simply make a selection and the route is autopopulated to the IFly flight plan. Then I can make any tweaks I want from there.
Loving the app. Keep up the great work.
v/r,
Chad