Good, but could be better
I use it for peripheral nerve blocks and central lines, and the 6.1 inch display of the Iphone 11 is too small becouse of two things: 1) min depth is 4cm which is too much for superficial use 2) the app only can be used in a horizontal and not a vertical display If only one of this is corrected (or the two them) I could use it with my phone instead of the 9.7 inch IPad.