For the last 2 years I've been using AB mobile and it's worked okay but still not 100% accurate from week to week like I want especially if I travel or if theres a decent weather change. I picked up a kestrel 5700 sportsman with the Bushnell conx..got my rifle profiles put in and the kestrel on every profile is telling me I need .3mil more elevation than AB mobile is telling me but my actual elevation adjustment is closer to AB mobile. I havent trued MV or BC on either platforms. I will be truing the MV/BC in the kestrel ASAP