While shopping for a remote start/alarm system I too thought about the smart start feature. The app fees were a little disappointing, I thought. The system I ended up going with can easily be upgraded to the smart start if I ever wanted to do that.
Right now my viper 5601 has a range of 2000 feet, so for most instances I don't think that I would use the smart start at all. Possibly if I were flying for my job and leaving my vehicle at the airport, but other than that I think that 2000 feet is more than adequate range.