Thanks for the quick reply. I didn’t compare it with what I expected to find, but with the measurements done with another multimeter, which displays 120 AC. So I tried to use “buffer mode” to see the sine wave, and it does not work. It just hangs whilst displaying the spinning circle. I left it for several minutes to see if it responds, but it doesn’t, it just shows the spinning circle. I am using a Nexus 4 with Android version 4.4.4. Any ideas why the mooshimeter app hangs when trying to use “buffer mode”?