All the Turkey calls on the market are used for both Spring and Fall. The easyest call to use is the push button, Friction calls are hard to learn to do the fall call (Kee-Kee) on. One can master the mouth call with practice. Having a number of different calls is good practice and learning to use them will go a long way. As far as the moving thing , I believe that a friction caller is just a successfull as the mouth caller ,its just in the way one hunts. A couple of videos and some Call practice can get a hunter into the killing part of the game. Don't be scared to go to sports shows and ask some of the call companies on how to use different type calls , most are glad to help out...BT