I'm heavily considering picking up a Kestrel weather station to assist in accurate long range shooting (long range defined as 500 - 1000). The two options I'm looking at are the Kestrel 3500 and the Kestrel 4000 with bluetooth. The 3500 has all the data I'm interested in, but is not bluetooth capable. The 4000 is bluetooth capable, meaning it can connect to and automatically input the weather data into my shooter app (Shooter on Android). The drawback to the 4000 is the extra $140 it will cost to get the bluetooth capability. If it works well with the Shooter app, it might be worth the extra coin. Does anybody here have experience with a bluetooth Kestrel and connecting to a ballistics app? If so, how well does it work? Any other advice on the subject is welcome also.