I have been using a lowrance huntc gps for years to scout and mark my treestands. I would use it when I headed into the woods early morning in the dark and my GPS just guided me to them. The gps bit the dust and I do not really want to lay out the change to get a new one if I do not have to. I used to mark the trees before the days of GPS with tacks or tape. Is there an app for cell phones that would do the same thing as the gps? Thanks in advance and God bless.