As a reality check, note that by far the majority of shooters do not NEED ballistic software at all. Many of those who WANT ballistic software will really only use a minimum amount of features, drop and drift, maybe a picture of their reticle with drops marked. Now that everyone carries around a computer just to make phone calls, everyone and their grandmother can and does write 'apps' for the device and gives them away on the AppStore, virtually all of those shooters will only want to buy a $10-50 program. Some will break down and buy the Kestrel AB unit, or just use software delivered in the LRF.
FFS is a professional grade system, feature rich and robust. Is the platform dated, yes. But as stated above that's not actually a bad thing. My system, (Nomad w/Vector IV/21) is drop tested, waterproof, field chargeable and battery replaceable, NVG compatible and will answer pretty much any ballistic question I might ask. For ELR work, there is nothing better. I've got probably $20K invested in the .375CT and .338LM systems, dropping $1500 on the computer that makes them actually WORK seems like nothing at all.
Bottom line, it's the only software system I really recommend for the XLR class here at Gunsite, having watched many people struggle with the iPhone/Kestrel systems.
If you have a few rifles and shoot mostly 1200 yards or less, go to JBM online and make up some DA cards, or if your calibers work out use the FDAC, you are really just as well off as you'd be with any iPhone app. If you are working as a professional, or need to stretch out the range to where a computer is required for first round hits, then FFS is the tool of choice.