However, because this is research, I need to back up the claim that they are available everywhere with numbers or results. I am having a hard time finding a source that shows the percentage of mobile devices with a given sensor. For example, a list like this would be ideal:
Accelerometer: 96.7% Gyroscope: 83.2% Touchscreen: 99.5% Front-Facing Camera: 69.3% Rear-Facing Camera: 79.5%
TLR - How many devices on the market have a certain sensor?