To the first reply it's 2014 who does not have a phone that can download. Apps.??? It's time for a new phone!
On the second one building a target system that reliably resets using a spinner or other hit type reset and then rests it's self is not very reliable and limits the type and style of targets you have. With the system I built I can pull the bar out put on new targets of different shapes or thicknesses for different calibers in a matter of just a few seconds. I like my target platform and design just want a really reliable yet simple wireless reset system.