Like several of you, I do not have a smartphone either. But guess what? I do have a web tablet. It has the Android operating system and a built in accelerometer.
I downloaded the LiftPulse app (free) and installed it on the web tablet. Strapped the web tablet to my wife's leg (she does not have OT) in order to get the baseline, or control reading. Then I strapped the web tablet to the calf muscle on my right leg using an ordinary pants belt, punched the start button on the LiftPulse app and took my 10 second recording.
Against my wife's fairly flat recording, mine produced a startling huge spike at about 14 - 15 Hz on the right hand edge where it got cut off by the LiftPulse present upper limit of 15 Hz.
Pretty dang impressive. first time in about 18 years of having this disorder that I have been able to "see" what is going on down there with my jitterbug legs.
I also figured out how to take a screen shot of the tremor chart so that I can share it with others - maybe even you guys, if Jeff agrees.
People on TV are always saying when they show you something awesome, "Don't try this at home". So yes, this is something you can "try this at home".
NOTE: As mentioned above if the tremor is above the threshold of the 15Hz limit of the LiftPulse App the will not show the tremor on the graph. Currently there are other apps that do show a range above 15Hz and hopefully in the future LiftPulse will also include this range to include OT.
Here's an interesting chart showing the range of disorders and the frequency of the tremors. OT is the only tremor listed that is >12Hz, which is why measuring the frequency might be very important in a diagnosis.