Would slide my ball over such that a bladed shot wouldn't hit him. I don't know enough about turtles to know if touching them is ok.
If I was in a tournament Id probably just hit a really fat shot because I'd be so terrified of blading one.
In my part of the country I first determine whether the turtle is a snapping turtle or just an eastern painted turtle. I leave snappers alone as they have a fairly long, flexible neck. The eastern one's I tend to pickup and move them along in the direction they were traveling. They tend to urinate when picked up so one needs to be sure to aim them in the right direction.
I played for years without anything but markers and hopefully a good guess.
I have a few free apps on my phone, but they never really worked well for me... I'm pretty sure it is operator error. But I also suspect that the free ones are more cumbersome and lack some features. I recently got an inexpensive laser rangefinder and I am really enjoying it. It is quick and doesn't slow me down and it is easy to either pick up the pin or scan a certain area.
I do agree that there is some over the top marketing hype about the accuracy of these devices such as +/- a yard (meter) vs. +/- 1/2 yard (meter) or a readout in tenths of a yard (meter). A person really needs to know that the flag is precisely 77.3 yards away? For most golfers they give a good idea of the distance and that is really valuable. I am also charting my iron distances so I will have a better idea of how far I really hit each one. I have also taken readings back to the tee to get a feel for the longer distances.