DJI has recently come out with the Mavic Mini 4 and will soon release a Mini 5, which means the older Mini 3 can often be a bargain!  There is a difference, however, between the Mini 3 and the Mini 3 Pro.  The Pro model has additional obstacle avoidance and  has higher resolution still photo capture.  It also has the ability to track a moving object and the Mini 3 does not.  However, there is a 'hack' that will allow the Mini 3 to track a moving object - such as a walking person and Jim and Fred demonstrate how to make it happen!