Bests & Worsts Reviews from Amazon

I must tell you right up front that I am an engineer. In this case, that means I know any measuring instrument is judged by "Gauge R&R", meaning gauge reliability and repeatability. In this case, that is nonexistent. On some days the app will indicate you are imparting 18 pounds of force when YOU ARE NOT EVEN TOUCHING THE DEVICE! On another day it will say your maximum grip strength is 80 pounds, though tomorrow it will indicate 40 pounds. It is totally ridiculous. Also, as is the vogue these days, the instructions are minimal to the point of being utterly ridiculous. If you can get past this the device is even more useful, assuming that is even possible..