I am curious too, tech and data are such an asset for farmers to manage their farms. I know there is Pasture.io, does anyone here has experience with this system or simular ones? 

We still mostly go by cow condition and pasture look, but we do back it up with a plate meter once a week. Tried an app for measuring, it’s handy, but at the end of the day you can usually tell when the grass is ready just by walking the paddock. Tech is nice, but gut feeling still plays a big role here.