These may be a cheaper alternative, and will work when calibrated for a single user.
However varying finger sizes in width will apply different amounts of stretch tension to the material, resulting in inconsistent measurements for different users.
One could argue that a calibration could be saved for each and every user.
This is true but quite honestly people will not and cannot be bothered to do this and will be turned off quite significantly by the idea of having to spend even a few seconds calibrating and selecting their own settings every time they want to use the device.
Surveys sent out to people will prove rather contradictory as people will say that “They wouldn’t mind calibrating the device if it meant more accuracy and less power consumption” – as it is a conscious thought process that people will not want to come off as innately lazy and unwilling to go through a simple calibration process until you ask them to be brutally honest (which at that point is like trying to force them to answer in your favour).
At this point I have returned to using the idea of multiple accelerometers.
IMPACTVR 