As of today, I have my "tremipen" in use! Works very well and is easy to use!
One can measure very well the resting tremor & holding tremor.
Unfortunately, not the movement tremor. Actually, this should be very well possible with the cell phone in conjunction with an app. Does anyone know such an app or a device which measures the movement tremor?
Tremor Reduction - Vilim Ball
Early sensation of the pill-rolling tremor
Devices to reduce tremor 
ACTIVE-ASSISTED CYCLING improves tremor and bradykinesia in Parkinson's disease.
Vibration Plate for Tremors
